Merge tag 'mute-led-rework' of https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound into asoc-5.13

ALSA: control - add generic LED API

This patchset tries to resolve the diversity in the audio LED
control among the ALSA drivers. A new control layer registration
is introduced which allows to run additional operations on
top of the elementary ALSA sound controls.

A new control access group (three bits in the access flags)
was introduced to carry the LED group information for
the sound controls. The low-level sound drivers can just
mark those controls using this access group. This information
is not exported to the user space, but user space can
manage the LED sound control associations through sysfs
(last patch) per Mark's request. It makes things fully
configurable in the kernel and user space (UCM).

The actual state ('route') evaluation is really easy
(the minimal value check for all channels / controls / cards).
If there's more complicated logic for a given hardware,
the card driver may eventually export a new read-only
sound control for the LED group and do the logic itself.

The new LED trigger control code is completely separated
and possibly optional (there's no symbol dependency).
The full code separation allows eventually to move this
LED trigger control to the user space in future.
Actually it replaces the already present functionality
in the kernel space (HDA drivers) and allows a quick adoption
for the recent hardware (ASoC codecs including SoundWire).

snd_ctl_led            24576  0

The sound driver implementation is really easy:

1) call snd_ctl_led_request() when control LED layer should be
   automatically activated
   / it calls module_request("snd-ctl-led") on demand /
2) mark all related kcontrols with
        SNDRV_CTL_ELEM_ACCESS_SPK_LED or
        SNDRV_CTL_ELEM_ACCESS_MIC_LED

Link: https://lore.kernel.org/r/20210317172945.842280-1-perex@perex.cz
Signed-off-by: Takashi Iwai <tiwai@suse.de>

22 files changed, 205 insertions, 652 deletions

diff --git a/arch/sparc/configs/sparc64_defconfig b/arch/sparc/configs/sparc64_defconfig
index 148f44b33890..12a4fb0bd52a 100644
--- a/arch/sparc/configs/sparc64_defconfig
+++ b/arch/sparc/configs/sparc64_defconfig
@@ -93,7 +93,7 @@ CONFIG_NETDEVICES=y
 CONFIG_NET_ETHERNET=y
 CONFIG_MII=m
 CONFIG_SUNLANCE=m
-CONFIG_HAPPYMEAL=m
+CONFIG_HAPPYMEAL=y
 CONFIG_SUNGEM=m
 CONFIG_SUNVNET=m
 CONFIG_LDMVSW=m
@@ -234,9 +234,7 @@ CONFIG_CRYPTO_TWOFISH=m
 CONFIG_CRC16=m
 CONFIG_LIBCRC32C=m
 CONFIG_VCC=m
-CONFIG_ATA=y
 CONFIG_PATA_CMD64X=y
-CONFIG_HAPPYMEAL=y
 CONFIG_IP_PNP=y
 CONFIG_IP_PNP_DHCP=y
 CONFIG_DEVTMPFS=y
diff --git a/arch/sparc/include/asm/elf_64.h b/arch/sparc/include/asm/elf_64.h
index 7e078bc73ef5..8fb09eec8c3e 100644
--- a/arch/sparc/include/asm/elf_64.h
+++ b/arch/sparc/include/asm/elf_64.h
@@ -8,7 +8,6 @@
 
 #include <asm/ptrace.h>
 #include <asm/processor.h>
-#include <asm/extable_64.h>
 #include <asm/spitfire.h>
 #include <asm/adi.h>
 
diff --git a/arch/sparc/include/asm/extable_64.h b/arch/sparc/include/asm/extable.h
index 5a0171907b7e..554a9dc376fc 100644
--- a/arch/sparc/include/asm/extable_64.h
+++ b/arch/sparc/include/asm/extable.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __ASM_EXTABLE64_H
-#define __ASM_EXTABLE64_H
+#ifndef __ASM_EXTABLE_H
+#define __ASM_EXTABLE_H
 /*
  * The exception table consists of pairs of addresses: the first is the
  * address of an instruction that is allowed to fault, and the second is
diff --git a/arch/sparc/include/asm/processor_32.h b/arch/sparc/include/asm/processor_32.h
index 3c4bc2189092..b6242f7771e9 100644
--- a/arch/sparc/include/asm/processor_32.h
+++ b/arch/sparc/include/asm/processor_32.h
@@ -50,16 +50,12 @@ struct thread_struct {
 	unsigned long   fsr;
 	unsigned long   fpqdepth;
 	struct fpq	fpqueue[16];
-	unsigned long flags;
 	mm_segment_t current_ds;
 };
 
-#define SPARC_FLAG_KTHREAD      0x1    /* task is a kernel thread */
-#define SPARC_FLAG_UNALIGNED    0x2    /* is allowed to do unaligned accesses */
-
 #define INIT_THREAD  { \
-	.flags = SPARC_FLAG_KTHREAD, \
 	.current_ds = KERNEL_DS, \
+	.kregs = (struct pt_regs *)(init_stack+THREAD_SIZE)-1 \
 }
 
 /* Do necessary setup to start up a newly executed thread. */
diff --git a/arch/sparc/include/asm/thread_info_64.h b/arch/sparc/include/asm/thread_info_64.h
index 42cd4cd3892e..8047a9caab2f 100644
--- a/arch/sparc/include/asm/thread_info_64.h
+++ b/arch/sparc/include/asm/thread_info_64.h
@@ -118,6 +118,7 @@ struct thread_info {
 	.task		=	&tsk,			\
 	.current_ds	=	ASI_P,			\
 	.preempt_count	=	INIT_PREEMPT_COUNT,	\
+	.kregs		=	(struct pt_regs *)(init_stack+THREAD_SIZE)-1 \
 }
 
 /* how to get the thread information struct from C */
diff --git a/arch/sparc/include/asm/uaccess.h b/arch/sparc/include/asm/uaccess.h
index dd85bc2c2cad..390094200fc4 100644
--- a/arch/sparc/include/asm/uaccess.h
+++ b/arch/sparc/include/asm/uaccess.h
@@ -1,6 +1,9 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 #ifndef ___ASM_SPARC_UACCESS_H
 #define ___ASM_SPARC_UACCESS_H
+
+#include <asm/extable.h>
+
 #if defined(__sparc__) && defined(__arch64__)
 #include <asm/uaccess_64.h>
 #else
diff --git a/arch/sparc/include/asm/uaccess_32.h b/arch/sparc/include/asm/uaccess_32.h
index 0a2d3ebc4bb8..4a12346bb69c 100644
--- a/arch/sparc/include/asm/uaccess_32.h
+++ b/arch/sparc/include/asm/uaccess_32.h
@@ -13,9 +13,6 @@
 
 #include <asm/processor.h>
 
-#define ARCH_HAS_SORT_EXTABLE
-#define ARCH_HAS_SEARCH_EXTABLE
-
 /* Sparc is not segmented, however we need to be able to fool access_ok()
  * when doing system calls from kernel mode legitimately.
  *
@@ -40,36 +37,6 @@
 #define __access_ok(addr, size) (__user_ok((addr) & get_fs().seg, (size)))
 #define access_ok(addr, size) __access_ok((unsigned long)(addr), size)
 
-/*
- * The exception table consists of pairs of addresses: the first is the
- * address of an instruction that is allowed to fault, and the second is
- * the address at which the program should continue.  No registers are
- * modified, so it is entirely up to the continuation code to figure out
- * what to do.
- *
- * All the routines below use bits of fixup code that are out of line
- * with the main instruction path.  This means when everything is well,
- * we don't even have to jump over them.  Further, they do not intrude
- * on our cache or tlb entries.
- *
- * There is a special way how to put a range of potentially faulting
- * insns (like twenty ldd/std's with now intervening other instructions)
- * You specify address of first in insn and 0 in fixup and in the next
- * exception_table_entry you specify last potentially faulting insn + 1
- * and in fixup the routine which should handle the fault.
- * That fixup code will get
- * (faulting_insn_address - first_insn_in_the_range_address)/4
- * in %g2 (ie. index of the faulting instruction in the range).
- */
-
-struct exception_table_entry
-{
-        unsigned long insn, fixup;
-};
-
-/* Returns 0 if exception not found and fixup otherwise.  */
-unsigned long search_extables_range(unsigned long addr, unsigned long *g2);
-
 /* Uh, these should become the main single-value transfer routines..
  * They automatically use the right size if we just have the right
  * pointer type..
@@ -252,12 +219,7 @@ static inline unsigned long __clear_user(void __user *addr, unsigned long size)
 	unsigned long ret;
 
 	__asm__ __volatile__ (
-		".section __ex_table,#alloc\n\t"
-		".align 4\n\t"
-		".word 1f,3\n\t"
-		".previous\n\t"
 		"mov %2, %%o1\n"
-		"1:\n\t"
 		"call __bzero\n\t"
 		" mov %1, %%o0\n\t"
 		"mov %%o0, %0\n"
diff --git a/arch/sparc/include/asm/uaccess_64.h b/arch/sparc/include/asm/uaccess_64.h
index 698cf69f74e9..30eb4c6414d1 100644
--- a/arch/sparc/include/asm/uaccess_64.h
+++ b/arch/sparc/include/asm/uaccess_64.h
@@ -10,7 +10,6 @@
 #include <linux/string.h>
 #include <asm/asi.h>
 #include <asm/spitfire.h>
-#include <asm/extable_64.h>
 
 #include <asm/processor.h>
 
diff --git a/arch/sparc/kernel/head_32.S b/arch/sparc/kernel/head_32.S
index be30c8d4cc73..6044b82b9767 100644
--- a/arch/sparc/kernel/head_32.S
+++ b/arch/sparc/kernel/head_32.S
@@ -515,7 +515,7 @@ continue_boot:
 
 		/* I want a kernel stack NOW! */
 		set	init_thread_union, %g1
-		set	(THREAD_SIZE - STACKFRAME_SZ), %g2
+		set	(THREAD_SIZE - STACKFRAME_SZ - TRACEREG_SZ), %g2
 		add	%g1, %g2, %sp
 		mov	0, %fp			/* And for good luck */
 
diff --git a/arch/sparc/kernel/head_64.S b/arch/sparc/kernel/head_64.S
index c5ff2472b3d9..72a5bdc833ea 100644
--- a/arch/sparc/kernel/head_64.S
+++ b/arch/sparc/kernel/head_64.S
@@ -706,7 +706,7 @@ tlb_fixup_done:
 	wr	%g0, ASI_P, %asi
 	mov	1, %g1
 	sllx	%g1, THREAD_SHIFT, %g1
-	sub	%g1, (STACKFRAME_SZ + STACK_BIAS), %g1
+	sub	%g1, (STACKFRAME_SZ + STACK_BIAS + TRACEREG_SZ), %g1
 	add	%g6, %g1, %sp
 
 	/* Set per-cpu pointer initially to zero, this makes
diff --git a/arch/sparc/kernel/process_32.c b/arch/sparc/kernel/process_32.c
index b91e88058e0c..3b9794978e5b 100644
--- a/arch/sparc/kernel/process_32.c
+++ b/arch/sparc/kernel/process_32.c
@@ -216,16 +216,6 @@ void flush_thread(void)
 		clear_thread_flag(TIF_USEDFPU);
 #endif
 	}
-
-	/* This task is no longer a kernel thread. */
-	if (current->thread.flags & SPARC_FLAG_KTHREAD) {
-		current->thread.flags &= ~SPARC_FLAG_KTHREAD;
-
-		/* We must fixup kregs as well. */
-		/* XXX This was not fixed for ti for a while, worked. Unused? */
-		current->thread.kregs = (struct pt_regs *)
-		    (task_stack_page(current) + (THREAD_SIZE - TRACEREG_SZ));
-	}
 }
 
 static inline struct sparc_stackf __user *
@@ -313,7 +303,6 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, unsigned long arg,
 		extern int nwindows;
 		unsigned long psr;
 		memset(new_stack, 0, STACKFRAME_SZ + TRACEREG_SZ);
-		p->thread.flags |= SPARC_FLAG_KTHREAD;
 		p->thread.current_ds = KERNEL_DS;
 		ti->kpc = (((unsigned long) ret_from_kernel_thread) - 0x8);
 		childregs->u_regs[UREG_G1] = sp; /* function */
@@ -325,7 +314,6 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, unsigned long arg,
 	}
 	memcpy(new_stack, (char *)regs - STACKFRAME_SZ, STACKFRAME_SZ + TRACEREG_SZ);
 	childregs->u_regs[UREG_FP] = sp;
-	p->thread.flags &= ~SPARC_FLAG_KTHREAD;
 	p->thread.current_ds = USER_DS;
 	ti->kpc = (((unsigned long) ret_from_fork) - 0x8);
 	ti->kpsr = current->thread.fork_kpsr | PSR_PIL;
diff --git a/arch/sparc/kernel/setup_32.c b/arch/sparc/kernel/setup_32.c
index eea43a1aef1b..c8e0dd99f370 100644
--- a/arch/sparc/kernel/setup_32.c
+++ b/arch/sparc/kernel/setup_32.c
@@ -266,7 +266,6 @@ static __init void leon_patch(void)
 }
 
 struct tt_entry *sparc_ttable;
-static struct pt_regs fake_swapper_regs;
 
 /* Called from head_32.S - before we have setup anything
  * in the kernel. Be very careful with what you do here.
@@ -363,8 +362,6 @@ void __init setup_arch(char **cmdline_p)
 		(*(linux_dbvec->teach_debugger))();
 	}
 
-	init_task.thread.kregs = &fake_swapper_regs;
-
 	/* Run-time patch instructions to match the cpu model */
 	per_cpu_patch();
 
diff --git a/arch/sparc/kernel/setup_64.c b/arch/sparc/kernel/setup_64.c
index d87244197d5c..48abee4eee29 100644
--- a/arch/sparc/kernel/setup_64.c
+++ b/arch/sparc/kernel/setup_64.c
@@ -165,8 +165,6 @@ extern int root_mountflags;
 
 char reboot_command[COMMAND_LINE_SIZE];
 
-static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
-
 static void __init per_cpu_patch(void)
 {
 	struct cpuid_patch_entry *p;
@@ -661,8 +659,6 @@ void __init setup_arch(char **cmdline_p)
 	rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
 #endif
 
-	task_thread_info(&init_task)->kregs = &fake_swapper_regs;
-
 #ifdef CONFIG_IP_PNP
 	if (!ic_set_manually) {
 		phandle chosen = prom_finddevice("/chosen");
diff --git a/arch/sparc/kernel/traps_64.c b/arch/sparc/kernel/traps_64.c
index d92e5eaa4c1d..a850dccd78ea 100644
--- a/arch/sparc/kernel/traps_64.c
+++ b/arch/sparc/kernel/traps_64.c
@@ -275,14 +275,13 @@ bool is_no_fault_exception(struct pt_regs *regs)
 			asi = (regs->tstate >> 24); /* saved %asi       */
 		else
 			asi = (insn >> 5);	    /* immediate asi    */
-		if ((asi & 0xf2) == ASI_PNF) {
-			if (insn & 0x1000000) {     /* op3[5:4]=3       */
-				handle_ldf_stq(insn, regs);
-				return true;
-			} else if (insn & 0x200000) { /* op3[2], stores */
+		if ((asi & 0xf6) == ASI_PNF) {
+			if (insn & 0x200000)        /* op3[2], stores   */
 				return false;
-			}
-			handle_ld_nf(insn, regs);
+			if (insn & 0x1000000)       /* op3[5:4]=3 (fp)  */
+				handle_ldf_stq(insn, regs);
+			else
+				handle_ld_nf(insn, regs);
 			return true;
 		}
 	}
diff --git a/arch/sparc/kernel/unaligned_32.c b/arch/sparc/kernel/unaligned_32.c
index 83db94c0b431..ef5c5207c9ff 100644
--- a/arch/sparc/kernel/unaligned_32.c
+++ b/arch/sparc/kernel/unaligned_32.c
@@ -16,6 +16,7 @@
 #include <linux/uaccess.h>
 #include <linux/smp.h>
 #include <linux/perf_event.h>
+#include <linux/extable.h>
 
 #include <asm/setup.h>
 
@@ -213,10 +214,10 @@ static inline int ok_for_kernel(unsigned int insn)
 
 static void kernel_mna_trap_fault(struct pt_regs *regs, unsigned int insn)
 {
-	unsigned long g2 = regs->u_regs [UREG_G2];
-	unsigned long fixup = search_extables_range(regs->pc, &g2);
+	const struct exception_table_entry *entry;
 
-	if (!fixup) {
+	entry = search_exception_tables(regs->pc);
+	if (!entry) {
 		unsigned long address = compute_effective_address(regs, insn);
         	if(address < PAGE_SIZE) {
                 	printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference in mna handler");
@@ -232,9 +233,8 @@ static void kernel_mna_trap_fault(struct pt_regs *regs, unsigned int insn)
 	        die_if_kernel("Oops", regs);
 		/* Not reached */
 	}
-	regs->pc = fixup;
+	regs->pc = entry->fixup;
 	regs->npc = regs->pc + 4;
-	regs->u_regs [UREG_G2] = g2;
 }
 
 asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn)
@@ -274,103 +274,9 @@ asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn)
 	}
 }
 
-static inline int ok_for_user(struct pt_regs *regs, unsigned int insn,
-			      enum direction dir)
-{
-	unsigned int reg;
-	int size = ((insn >> 19) & 3) == 3 ? 8 : 4;
-
-	if ((regs->pc | regs->npc) & 3)
-		return 0;
-
-	/* Must access_ok() in all the necessary places. */
-#define WINREG_ADDR(regnum) \
-	((void __user *)(((unsigned long *)regs->u_regs[UREG_FP])+(regnum)))
-
-	reg = (insn >> 25) & 0x1f;
-	if (reg >= 16) {
-		if (!access_ok(WINREG_ADDR(reg - 16), size))
-			return -EFAULT;
-	}
-	reg = (insn >> 14) & 0x1f;
-	if (reg >= 16) {
-		if (!access_ok(WINREG_ADDR(reg - 16), size))
-			return -EFAULT;
-	}
-	if (!(insn & 0x2000)) {
-		reg = (insn & 0x1f);
-		if (reg >= 16) {
-			if (!access_ok(WINREG_ADDR(reg - 16), size))
-				return -EFAULT;
-		}
-	}
-#undef WINREG_ADDR
-	return 0;
-}
-
-static void user_mna_trap_fault(struct pt_regs *regs, unsigned int insn)
+asmlinkage void user_unaligned_trap(struct pt_regs *regs, unsigned int insn)
 {
 	send_sig_fault(SIGBUS, BUS_ADRALN,
 		       (void __user *)safe_compute_effective_address(regs, insn),
 		       0, current);
 }
-
-asmlinkage void user_unaligned_trap(struct pt_regs *regs, unsigned int insn)
-{
-	enum direction dir;
-
-	if(!(current->thread.flags & SPARC_FLAG_UNALIGNED) ||
-	   (((insn >> 30) & 3) != 3))
-		goto kill_user;
-	dir = decode_direction(insn);
-	if(!ok_for_user(regs, insn, dir)) {
-		goto kill_user;
-	} else {
-		int err, size = decode_access_size(insn);
-		unsigned long addr;
-
-		if(floating_point_load_or_store_p(insn)) {
-			printk("User FPU load/store unaligned unsupported.\n");
-			goto kill_user;
-		}
-
-		addr = compute_effective_address(regs, insn);
-		perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS, 1, regs, addr);
-		switch(dir) {
-		case load:
-			err = do_int_load(fetch_reg_addr(((insn>>25)&0x1f),
-							 regs),
-					  size, (unsigned long *) addr,
-					  decode_signedness(insn));
-			break;
-
-		case store:
-			err = do_int_store(((insn>>25)&0x1f), size,
-					   (unsigned long *) addr, regs);
-			break;
-
-		case both:
-			/*
-			 * This was supported in 2.4. However, we question
-			 * the value of SWAP instruction across word boundaries.
-			 */
-			printk("Unaligned SWAP unsupported.\n");
-			err = -EFAULT;
-			break;
-
-		default:
-			unaligned_panic("Impossible user unaligned trap.");
-			goto out;
-		}
-		if (err)
-			goto kill_user;
-		else
-			advance(regs);
-		goto out;
-	}
-
-kill_user:
-	user_mna_trap_fault(regs, insn);
-out:
-	;
-}
diff --git a/arch/sparc/lib/checksum_32.S b/arch/sparc/lib/checksum_32.S
index 7488d130faf7..781e39b3c009 100644
--- a/arch/sparc/lib/checksum_32.S
+++ b/arch/sparc/lib/checksum_32.S
@@ -155,13 +155,6 @@ cpout:	retl						! get outta here
         .text;                                  \
         .align  4
 
-#define EXT(start,end)				\
-        .section __ex_table,ALLOC;		\
-        .align  4;                              \
-        .word   start, 0, end, cc_fault;         \
-        .text;                                  \
-        .align  4
-
 	/* This aligned version executes typically in 8.5 superscalar cycles, this
 	 * is the best I can do.  I say 8.5 because the final add will pair with
 	 * the next ldd in the main unrolled loop.  Thus the pipe is always full.
@@ -169,20 +162,20 @@ cpout:	retl						! get outta here
 	 * please check the fixup code below as well.
 	 */
 #define CSUMCOPY_BIGCHUNK_ALIGNED(src, dst, sum, off, t0, t1, t2, t3, t4, t5, t6, t7)	\
-	ldd	[src + off + 0x00], t0;							\
-	ldd	[src + off + 0x08], t2;							\
+	EX(ldd	[src + off + 0x00], t0);						\
+	EX(ldd	[src + off + 0x08], t2);						\
 	addxcc	t0, sum, sum;								\
-	ldd	[src + off + 0x10], t4;							\
+	EX(ldd	[src + off + 0x10], t4);						\
 	addxcc	t1, sum, sum;								\
-	ldd	[src + off + 0x18], t6;							\
+	EX(ldd	[src + off + 0x18], t6);						\
 	addxcc	t2, sum, sum;								\
-	std	t0, [dst + off + 0x00];							\
+	EX(std	t0, [dst + off + 0x00]);						\
 	addxcc	t3, sum, sum;								\
-	std	t2, [dst + off + 0x08];							\
+	EX(std	t2, [dst + off + 0x08]);						\
 	addxcc	t4, sum, sum;								\
-	std	t4, [dst + off + 0x10];							\
+	EX(std	t4, [dst + off + 0x10]);						\
 	addxcc	t5, sum, sum;								\
-	std	t6, [dst + off + 0x18];							\
+	EX(std	t6, [dst + off + 0x18]);						\
 	addxcc	t6, sum, sum;								\
 	addxcc	t7, sum, sum;
 
@@ -191,39 +184,39 @@ cpout:	retl						! get outta here
 	 * Viking MXCC into streaming mode.  Ho hum...
 	 */
 #define CSUMCOPY_BIGCHUNK(src, dst, sum, off, t0, t1, t2, t3, t4, t5, t6, t7)	\
-	ldd	[src + off + 0x00], t0;						\
-	ldd	[src + off + 0x08], t2;						\
-	ldd	[src + off + 0x10], t4;						\
-	ldd	[src + off + 0x18], t6;						\
-	st	t0, [dst + off + 0x00];						\
+	EX(ldd	[src + off + 0x00], t0);					\
+	EX(ldd	[src + off + 0x08], t2);					\
+	EX(ldd	[src + off + 0x10], t4);					\
+	EX(ldd	[src + off + 0x18], t6);					\
+	EX(st	t0, [dst + off + 0x00]);					\
 	addxcc	t0, sum, sum;							\
-	st	t1, [dst + off + 0x04];						\
+	EX(st	t1, [dst + off + 0x04]);					\
 	addxcc	t1, sum, sum;							\
-	st	t2, [dst + off + 0x08];						\
+	EX(st	t2, [dst + off + 0x08]);					\
 	addxcc	t2, sum, sum;							\
-	st	t3, [dst + off + 0x0c];						\
+	EX(st	t3, [dst + off + 0x0c]);					\
 	addxcc	t3, sum, sum;							\
-	st	t4, [dst + off + 0x10];						\
+	EX(st	t4, [dst + off + 0x10]);					\
 	addxcc	t4, sum, sum;							\
-	st	t5, [dst + off + 0x14];						\
+	EX(st	t5, [dst + off + 0x14]);					\
 	addxcc	t5, sum, sum;							\
-	st	t6, [dst + off + 0x18];						\
+	EX(st	t6, [dst + off + 0x18]);					\
 	addxcc	t6, sum, sum;							\
-	st	t7, [dst + off + 0x1c];						\
+	EX(st	t7, [dst + off + 0x1c]);					\
 	addxcc	t7, sum, sum;
 
 	/* Yuck, 6 superscalar cycles... */
 #define CSUMCOPY_LASTCHUNK(src, dst, sum, off, t0, t1, t2, t3)	\
-	ldd	[src - off - 0x08], t0;				\
-	ldd	[src - off - 0x00], t2;				\
+	EX(ldd	[src - off - 0x08], t0);			\
+	EX(ldd	[src - off - 0x00], t2);			\
 	addxcc	t0, sum, sum;					\
-	st	t0, [dst - off - 0x08];				\
+	EX(st	t0, [dst - off - 0x08]);			\
 	addxcc	t1, sum, sum;					\
-	st	t1, [dst - off - 0x04];				\
+	EX(st	t1, [dst - off - 0x04]);			\
 	addxcc	t2, sum, sum;					\
-	st	t2, [dst - off - 0x00];				\
+	EX(st	t2, [dst - off - 0x00]);			\
 	addxcc	t3, sum, sum;					\
-	st	t3, [dst - off + 0x04];
+	EX(st	t3, [dst - off + 0x04]);
 
 	/* Handle the end cruft code out of band for better cache patterns. */
 cc_end_cruft:
@@ -331,7 +324,6 @@ __csum_partial_copy_sparc_generic:
 	CSUMCOPY_BIGCHUNK(%o0,%o1,%g7,0x20,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
 	CSUMCOPY_BIGCHUNK(%o0,%o1,%g7,0x40,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
 	CSUMCOPY_BIGCHUNK(%o0,%o1,%g7,0x60,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
-10:	EXT(5b, 10b)			! note for exception handling
 	sub	%g1, 128, %g1		! detract from length
 	addx	%g0, %g7, %g7		! add in last carry bit
 	andcc	%g1, 0xffffff80, %g0	! more to csum?
@@ -356,8 +348,7 @@ cctbl:	CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x68,%g2,%g3,%g4,%g5)
 	CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x28,%g2,%g3,%g4,%g5)
 	CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x18,%g2,%g3,%g4,%g5)
 	CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x08,%g2,%g3,%g4,%g5)
-12:	EXT(cctbl, 12b)			! note for exception table handling
-	addx	%g0, %g7, %g7
+12:	addx	%g0, %g7, %g7
 	andcc	%o3, 0xf, %g0		! check for low bits set
 ccte:	bne	cc_end_cruft		! something left, handle it out of band
 	 andcc	%o3, 8, %g0		! begin checks for that code
@@ -367,7 +358,6 @@ ccdbl:	CSUMCOPY_BIGCHUNK_ALIGNED(%o0,%o1,%g7,0x00,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o
 	CSUMCOPY_BIGCHUNK_ALIGNED(%o0,%o1,%g7,0x20,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
 	CSUMCOPY_BIGCHUNK_ALIGNED(%o0,%o1,%g7,0x40,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
 	CSUMCOPY_BIGCHUNK_ALIGNED(%o0,%o1,%g7,0x60,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
-11:	EXT(ccdbl, 11b)			! note for exception table handling
 	sub	%g1, 128, %g1		! detract from length
 	addx	%g0, %g7, %g7		! add in last carry bit
 	andcc	%g1, 0xffffff80, %g0	! more to csum?
diff --git a/arch/sparc/lib/copy_user.S b/arch/sparc/lib/copy_user.S
index dc72f2b970b7..954572c78539 100644
--- a/arch/sparc/lib/copy_user.S
+++ b/arch/sparc/lib/copy_user.S
@@ -21,98 +21,134 @@
 /* Work around cpp -rob */
 #define ALLOC #alloc
 #define EXECINSTR #execinstr
+
+#define EX_ENTRY(l1, l2)			\
+	.section __ex_table,ALLOC;		\
+	.align	4;				\
+	.word	l1, l2;				\
+	.text;
+
 #define EX(x,y,a,b) 				\
 98: 	x,y;					\
 	.section .fixup,ALLOC,EXECINSTR;	\
 	.align	4;				\
-99:	ba fixupretl;				\
-	 a, b, %g3;				\
-	.section __ex_table,ALLOC;		\
-	.align	4;				\
-	.word	98b, 99b;			\
-	.text;					\
-	.align	4
+99:	retl;					\
+	 a, b, %o0;				\
+	EX_ENTRY(98b, 99b)
 
 #define EX2(x,y,c,d,e,a,b) 			\
 98: 	x,y;					\
 	.section .fixup,ALLOC,EXECINSTR;	\
 	.align	4;				\
 99:	c, d, e;				\
-	ba fixupretl;				\
-	 a, b, %g3;				\
-	.section __ex_table,ALLOC;		\
-	.align	4;				\
-	.word	98b, 99b;			\
-	.text;					\
-	.align	4
+	retl;					\
+	 a, b, %o0;				\
+	EX_ENTRY(98b, 99b)
 
 #define EXO2(x,y) 				\
 98: 	x, y;					\
-	.section __ex_table,ALLOC;		\
-	.align	4;				\
-	.word	98b, 97f;			\
-	.text;					\
-	.align	4
+	EX_ENTRY(98b, 97f)
 
-#define EXT(start,end,handler)			\
-	.section __ex_table,ALLOC;		\
-	.align	4;				\
-	.word	start, 0, end, handler;		\
-	.text;					\
-	.align	4
+#define LD(insn, src, offset, reg, label)	\
+98:	insn [%src + (offset)], %reg;		\
+	.section .fixup,ALLOC,EXECINSTR;	\
+99:	ba	label;				\
+	 mov	offset, %g5;			\
+	EX_ENTRY(98b, 99b)
 
-/* Please do not change following macros unless you change logic used
- * in .fixup at the end of this file as well
- */
+#define ST(insn, dst, offset, reg, label)	\
+98:	insn %reg, [%dst + (offset)];		\
+	.section .fixup,ALLOC,EXECINSTR;	\
+99:	ba	label;				\
+	 mov	offset, %g5;			\
+	EX_ENTRY(98b, 99b)
 
 /* Both these macros have to start with exactly the same insn */
+/* left: g7 + (g1 % 128) - offset */
 #define MOVE_BIGCHUNK(src, dst, offset, t0, t1, t2, t3, t4, t5, t6, t7) \
-	ldd	[%src + (offset) + 0x00], %t0; \
-	ldd	[%src + (offset) + 0x08], %t2; \
-	ldd	[%src + (offset) + 0x10], %t4; \
-	ldd	[%src + (offset) + 0x18], %t6; \
-	st	%t0, [%dst + (offset) + 0x00]; \
-	st	%t1, [%dst + (offset) + 0x04]; \
-	st	%t2, [%dst + (offset) + 0x08]; \
-	st	%t3, [%dst + (offset) + 0x0c]; \
-	st	%t4, [%dst + (offset) + 0x10]; \
-	st	%t5, [%dst + (offset) + 0x14]; \
-	st	%t6, [%dst + (offset) + 0x18]; \
-	st	%t7, [%dst + (offset) + 0x1c];
-
+	LD(ldd, src, offset + 0x00, t0, bigchunk_fault)	\
+	LD(ldd, src, offset + 0x08, t2, bigchunk_fault)	\
+	LD(ldd, src, offset + 0x10, t4, bigchunk_fault)	\
+	LD(ldd, src, offset + 0x18, t6, bigchunk_fault)	\
+	ST(st, dst, offset + 0x00, t0, bigchunk_fault)	\
+	ST(st, dst, offset + 0x04, t1, bigchunk_fault)	\
+	ST(st, dst, offset + 0x08, t2, bigchunk_fault)	\
+	ST(st, dst, offset + 0x0c, t3, bigchunk_fault)	\
+	ST(st, dst, offset + 0x10, t4, bigchunk_fault)	\
+	ST(st, dst, offset + 0x14, t5, bigchunk_fault)	\
+	ST(st, dst, offset + 0x18, t6, bigchunk_fault)	\
+	ST(st, dst, offset + 0x1c, t7, bigchunk_fault)
+
+/* left: g7 + (g1 % 128) - offset */
 #define MOVE_BIGALIGNCHUNK(src, dst, offset, t0, t1, t2, t3, t4, t5, t6, t7) \
-	ldd	[%src + (offset) + 0x00], %t0; \
-	ldd	[%src + (offset) + 0x08], %t2; \
-	ldd	[%src + (offset) + 0x10], %t4; \
-	ldd	[%src + (offset) + 0x18], %t6; \
-	std	%t0, [%dst + (offset) + 0x00]; \
-	std	%t2, [%dst + (offset) + 0x08]; \
-	std	%t4, [%dst + (offset) + 0x10]; \
-	std	%t6, [%dst + (offset) + 0x18];
+	LD(ldd, src, offset + 0x00, t0, bigchunk_fault)	\
+	LD(ldd, src, offset + 0x08, t2, bigchunk_fault)	\
+	LD(ldd, src, offset + 0x10, t4, bigchunk_fault)	\
+	LD(ldd, src, offset + 0x18, t6, bigchunk_fault)	\
+	ST(std, dst, offset + 0x00, t0, bigchunk_fault)	\
+	ST(std, dst, offset + 0x08, t2, bigchunk_fault)	\
+	ST(std, dst, offset + 0x10, t4, bigchunk_fault)	\
+	ST(std, dst, offset + 0x18, t6, bigchunk_fault)
 
+	.section .fixup,#alloc,#execinstr
+bigchunk_fault:
+	sub	%g7, %g5, %o0
+	and	%g1, 127, %g1
+	retl
+	 add	%o0, %g1, %o0
+
+/* left: offset + 16 + (g1 % 16) */
 #define MOVE_LASTCHUNK(src, dst, offset, t0, t1, t2, t3) \
-	ldd	[%src - (offset) - 0x10], %t0; \
-	ldd	[%src - (offset) - 0x08], %t2; \
-	st	%t0, [%dst - (offset) - 0x10]; \
-	st	%t1, [%dst - (offset) - 0x0c]; \
-	st	%t2, [%dst - (offset) - 0x08]; \
-	st	%t3, [%dst - (offset) - 0x04];
+	LD(ldd, src, -(offset + 0x10), t0, lastchunk_fault)	\
+	LD(ldd, src, -(offset + 0x08), t2, lastchunk_fault)	\
+	ST(st, dst, -(offset + 0x10), t0, lastchunk_fault)	\
+	ST(st, dst, -(offset + 0x0c), t1, lastchunk_fault)	\
+	ST(st, dst, -(offset + 0x08), t2, lastchunk_fault)	\
+	ST(st, dst, -(offset + 0x04), t3, lastchunk_fault)
 
-#define MOVE_HALFCHUNK(src, dst, offset, t0, t1, t2, t3) \
-	lduh	[%src + (offset) + 0x00], %t0; \
-	lduh	[%src + (offset) + 0x02], %t1; \
-	lduh	[%src + (offset) + 0x04], %t2; \
-	lduh	[%src + (offset) + 0x06], %t3; \
-	sth	%t0, [%dst + (offset) + 0x00]; \
-	sth	%t1, [%dst + (offset) + 0x02]; \
-	sth	%t2, [%dst + (offset) + 0x04]; \
-	sth	%t3, [%dst + (offset) + 0x06];
+	.section .fixup,#alloc,#execinstr
+lastchunk_fault:
+	and	%g1, 15, %g1
+	retl
+	 sub	%g1, %g5, %o0
 
+/* left: o3 + (o2 % 16) - offset */
+#define MOVE_HALFCHUNK(src, dst, offset, t0, t1, t2, t3) \
+	LD(lduh, src, offset + 0x00, t0, halfchunk_fault)	\
+	LD(lduh, src, offset + 0x02, t1, halfchunk_fault)	\
+	LD(lduh, src, offset + 0x04, t2, halfchunk_fault)	\
+	LD(lduh, src, offset + 0x06, t3, halfchunk_fault)	\
+	ST(sth, dst, offset + 0x00, t0, halfchunk_fault)	\
+	ST(sth, dst, offset + 0x02, t1, halfchunk_fault)	\
+	ST(sth, dst, offset + 0x04, t2, halfchunk_fault)	\
+	ST(sth, dst, offset + 0x06, t3, halfchunk_fault)
+
+/* left: o3 + (o2 % 16) + offset + 2 */
 #define MOVE_SHORTCHUNK(src, dst, offset, t0, t1) \
-	ldub	[%src - (offset) - 0x02], %t0; \
-	ldub	[%src - (offset) - 0x01], %t1; \
-	stb	%t0, [%dst - (offset) - 0x02]; \
-	stb	%t1, [%dst - (offset) - 0x01];
+	LD(ldub, src, -(offset + 0x02), t0, halfchunk_fault)	\
+	LD(ldub, src, -(offset + 0x01), t1, halfchunk_fault)	\
+	ST(stb, dst, -(offset + 0x02), t0, halfchunk_fault)	\
+	ST(stb, dst, -(offset + 0x01), t1, halfchunk_fault)
+
+	.section .fixup,#alloc,#execinstr
+halfchunk_fault:
+	and	%o2, 15, %o2
+	sub	%o3, %g5, %o3
+	retl
+	 add	%o2, %o3, %o0
+
+/* left: offset + 2 + (o2 % 2) */
+#define MOVE_LAST_SHORTCHUNK(src, dst, offset, t0, t1) \
+	LD(ldub, src, -(offset + 0x02), t0, last_shortchunk_fault)	\
+	LD(ldub, src, -(offset + 0x01), t1, last_shortchunk_fault)	\
+	ST(stb, dst, -(offset + 0x02), t0, last_shortchunk_fault)	\
+	ST(stb, dst, -(offset + 0x01), t1, last_shortchunk_fault)
+
+	.section .fixup,#alloc,#execinstr
+last_shortchunk_fault:
+	and	%o2, 1, %o2
+	retl
+	 sub	%o2, %g5, %o0
 
 	.text
 	.align	4
@@ -182,8 +218,6 @@ __copy_user:	/* %o0=dst %o1=src %o2=len */
 	MOVE_BIGCHUNK(o1, o0, 0x20, o2, o3, o4, o5, g2, g3, g4, g5)
 	MOVE_BIGCHUNK(o1, o0, 0x40, o2, o3, o4, o5, g2, g3, g4, g5)
 	MOVE_BIGCHUNK(o1, o0, 0x60, o2, o3, o4, o5, g2, g3, g4, g5)
-80:
-	EXT(5b, 80b, 50f)
 	subcc	%g7, 128, %g7
 	add	%o1, 128, %o1
 	bne	5b
@@ -201,7 +235,6 @@ __copy_user:	/* %o0=dst %o1=src %o2=len */
 	jmpl	%o5 + %lo(copy_user_table_end), %g0
 	 add	%o0, %g7, %o0
 
-copy_user_table:
 	MOVE_LASTCHUNK(o1, o0, 0x60, g2, g3, g4, g5)
 	MOVE_LASTCHUNK(o1, o0, 0x50, g2, g3, g4, g5)
 	MOVE_LASTCHUNK(o1, o0, 0x40, g2, g3, g4, g5)
@@ -210,7 +243,6 @@ copy_user_table:
 	MOVE_LASTCHUNK(o1, o0, 0x10, g2, g3, g4, g5)
 	MOVE_LASTCHUNK(o1, o0, 0x00, g2, g3, g4, g5)
 copy_user_table_end:
-	EXT(copy_user_table, copy_user_table_end, 51f)
 	be	copy_user_last7
 	 andcc	%g1, 4, %g0
 
@@ -250,8 +282,6 @@ ldd_std:
 	MOVE_BIGALIGNCHUNK(o1, o0, 0x20, o2, o3, o4, o5, g2, g3, g4, g5)
 	MOVE_BIGALIGNCHUNK(o1, o0, 0x40, o2, o3, o4, o5, g2, g3, g4, g5)
 	MOVE_BIGALIGNCHUNK(o1, o0, 0x60, o2, o3, o4, o5, g2, g3, g4, g5)
-81:
-	EXT(ldd_std, 81b, 52f)
 	subcc	%g7, 128, %g7
 	add	%o1, 128, %o1
 	bne	ldd_std
@@ -290,8 +320,6 @@ cannot_optimize:
 10:
 	MOVE_HALFCHUNK(o1, o0, 0x00, g2, g3, g4, g5)
 	MOVE_HALFCHUNK(o1, o0, 0x08, g2, g3, g4, g5)
-82:
-	EXT(10b, 82b, 53f)
 	subcc	%o3, 0x10, %o3
 	add	%o1, 0x10, %o1
 	bne	10b
@@ -308,8 +336,6 @@ byte_chunk:
 	MOVE_SHORTCHUNK(o1, o0, -0x0c, g2, g3)
 	MOVE_SHORTCHUNK(o1, o0, -0x0e, g2, g3)
 	MOVE_SHORTCHUNK(o1, o0, -0x10, g2, g3)
-83:
-	EXT(byte_chunk, 83b, 54f)
 	subcc	%o3, 0x10, %o3
 	add	%o1, 0x10, %o1
 	bne	byte_chunk
@@ -325,16 +351,14 @@ short_end:
 	add	%o1, %o3, %o1
 	jmpl	%o5 + %lo(short_table_end), %g0
 	 andcc	%o2, 1, %g0
-84:
-	MOVE_SHORTCHUNK(o1, o0, 0x0c, g2, g3)
-	MOVE_SHORTCHUNK(o1, o0, 0x0a, g2, g3)
-	MOVE_SHORTCHUNK(o1, o0, 0x08, g2, g3)
-	MOVE_SHORTCHUNK(o1, o0, 0x06, g2, g3)
-	MOVE_SHORTCHUNK(o1, o0, 0x04, g2, g3)
-	MOVE_SHORTCHUNK(o1, o0, 0x02, g2, g3)
-	MOVE_SHORTCHUNK(o1, o0, 0x00, g2, g3)
+	MOVE_LAST_SHORTCHUNK(o1, o0, 0x0c, g2, g3)
+	MOVE_LAST_SHORTCHUNK(o1, o0, 0x0a, g2, g3)
+	MOVE_LAST_SHORTCHUNK(o1, o0, 0x08, g2, g3)
+	MOVE_LAST_SHORTCHUNK(o1, o0, 0x06, g2, g3)
+	MOVE_LAST_SHORTCHUNK(o1, o0, 0x04, g2, g3)
+	MOVE_LAST_SHORTCHUNK(o1, o0, 0x02, g2, g3)
+	MOVE_LAST_SHORTCHUNK(o1, o0, 0x00, g2, g3)
 short_table_end:
-	EXT(84b, short_table_end, 55f)
 	be	1f
 	 nop
 	EX(ldub	[%o1], %g2, add %g0, 1)
@@ -363,123 +387,8 @@ short_aligned_end:
 	.section .fixup,#alloc,#execinstr
 	.align	4
 97:
-	mov	%o2, %g3
-fixupretl:
 	retl
-	 mov	%g3, %o0
-
-/* exception routine sets %g2 to (broken_insn - first_insn)>>2 */
-50:
-/* This magic counts how many bytes are left when crash in MOVE_BIGCHUNK
- * happens. This is derived from the amount ldd reads, st stores, etc.
- * x = g2 % 12;
- * g3 = g1 + g7 - ((g2 / 12) * 32 + (x < 4) ? 0 : (x - 4) * 4);
- * o0 += (g2 / 12) * 32;
- */
-	cmp	%g2, 12
-	add	%o0, %g7, %o0
-	bcs	1f
-	 cmp	%g2, 24
-	bcs	2f
-	 cmp	%g2, 36
-	bcs	3f
-	 nop
-	sub	%g2, 12, %g2
-	sub	%g7, 32, %g7
-3:	sub	%g2, 12, %g2
-	sub	%g7, 32, %g7
-2:	sub	%g2, 12, %g2
-	sub	%g7, 32, %g7
-1:	cmp	%g2, 4
-	bcs,a	60f
-	 clr	%g2
-	sub	%g2, 4, %g2
-	sll	%g2, 2, %g2
-60:	and	%g1, 0x7f, %g3
-	sub	%o0, %g7, %o0
-	add	%g3, %g7, %g3
-	ba	fixupretl
-	 sub	%g3, %g2, %g3
-51:
-/* i = 41 - g2; j = i % 6;
- * g3 = (g1 & 15) + (i / 6) * 16 + (j < 4) ? (j + 1) * 4 : 16;
- * o0 -= (i / 6) * 16 + 16;
- */
-	neg	%g2
-	and	%g1, 0xf, %g1
-	add	%g2, 41, %g2
-	add	%o0, %g1, %o0
-1:	cmp	%g2, 6
-	bcs,a	2f
-	 cmp	%g2, 4
-	add	%g1, 16, %g1
-	b	1b
-	 sub	%g2, 6, %g2
-2:	bcc,a	2f
-	 mov	16, %g2
-	inc	%g2
-	sll	%g2, 2, %g2
-2:	add	%g1, %g2, %g3
-	ba	fixupretl
-	 sub	%o0, %g3, %o0
-52:
-/* g3 = g1 + g7 - (g2 / 8) * 32 + (g2 & 4) ? (g2 & 3) * 8 : 0;
-   o0 += (g2 / 8) * 32 */
-	andn	%g2, 7, %g4
-	add	%o0, %g7, %o0
-	andcc	%g2, 4, %g0
-	and	%g2, 3, %g2
-	sll	%g4, 2, %g4
-	sll	%g2, 3, %g2
-	bne	60b
-	 sub	%g7, %g4, %g7
-	ba	60b
-	 clr	%g2
-53:
-/* g3 = o3 + (o2 & 15) - (g2 & 8) - (g2 & 4) ? (g2 & 3) * 2 : 0;
-   o0 += (g2 & 8) */
-	and	%g2, 3, %g4
-	andcc	%g2, 4, %g0
-	and	%g2, 8, %g2
-	sll	%g4, 1, %g4
-	be	1f
-	 add	%o0, %g2, %o0
-	add	%g2, %g4, %g2
-1:	and	%o2, 0xf, %g3
-	add	%g3, %o3, %g3
-	ba	fixupretl
-	 sub	%g3, %g2, %g3
-54:
-/* g3 = o3 + (o2 & 15) - (g2 / 4) * 2 - (g2 & 2) ? (g2 & 1) : 0;
-   o0 += (g2 / 4) * 2 */
-	srl	%g2, 2, %o4
-	and	%g2, 1, %o5
-	srl	%g2, 1, %g2
-	add	%o4, %o4, %o4
-	and	%o5, %g2, %o5
-	and	%o2, 0xf, %o2
-	add	%o0, %o4, %o0
-	sub	%o3, %o5, %o3
-	sub	%o2, %o4, %o2
-	ba	fixupretl
-	 add	%o2, %o3, %g3
-55:
-/* i = 27 - g2;
-   g3 = (o2 & 1) + i / 4 * 2 + !(i & 3);
-   o0 -= i / 4 * 2 + 1 */
-	neg	%g2
-	and	%o2, 1, %o2
-	add	%g2, 27, %g2
-	srl	%g2, 2, %o5
-	andcc	%g2, 3, %g0
-	mov	1, %g2
-	add	%o5, %o5, %o5
-	be,a	1f
-	 clr	%g2
-1:	add	%g2, %o5, %g3
-	sub	%o0, %g3, %o0
-	ba	fixupretl
-	 add	%g3, %o2, %g3
+	 mov	%o2, %o0
 
 	.globl  __copy_user_end
 __copy_user_end:
diff --git a/arch/sparc/lib/memset.S b/arch/sparc/lib/memset.S
index f427f34b8b79..eaff68213fdf 100644
--- a/arch/sparc/lib/memset.S
+++ b/arch/sparc/lib/memset.S
@@ -19,7 +19,7 @@
 98: 	x,y;					\
 	.section .fixup,ALLOC,EXECINSTR;	\
 	.align	4;				\
-99:	ba 30f;					\
+99:	retl;					\
 	 a, b, %o0;				\
 	.section __ex_table,ALLOC;		\
 	.align	4;				\
@@ -27,35 +27,44 @@
 	.text;					\
 	.align	4
 
-#define EXT(start,end,handler) 			\
+#define STORE(source, base, offset, n)		\
+98: 	std source, [base + offset + n];	\
+	.section .fixup,ALLOC,EXECINSTR;	\
+	.align	4;				\
+99:	ba 30f;					\
+	 sub %o3, n - offset, %o3;		\
 	.section __ex_table,ALLOC;		\
 	.align	4;				\
-	.word	start, 0, end, handler;		\
+	.word	98b, 99b;			\
 	.text;					\
-	.align	4
+	.align	4;
+
+#define STORE_LAST(source, base, offset, n)	\
+	EX(std source, [base - offset - n],	\
+	   add %o1, offset + n);
 
 /* Please don't change these macros, unless you change the logic
  * in the .fixup section below as well.
  * Store 64 bytes at (BASE + OFFSET) using value SOURCE. */
-#define ZERO_BIG_BLOCK(base, offset, source)    \
-	std	source, [base + offset + 0x00]; \
-	std	source, [base + offset + 0x08]; \
-	std	source, [base + offset + 0x10]; \
-	std	source, [base + offset + 0x18]; \
-	std	source, [base + offset + 0x20]; \
-	std	source, [base + offset + 0x28]; \
-	std	source, [base + offset + 0x30]; \
-	std	source, [base + offset + 0x38];
+#define ZERO_BIG_BLOCK(base, offset, source)	\
+	STORE(source, base, offset, 0x00);	\
+	STORE(source, base, offset, 0x08);	\
+	STORE(source, base, offset, 0x10);	\
+	STORE(source, base, offset, 0x18);	\
+	STORE(source, base, offset, 0x20);	\
+	STORE(source, base, offset, 0x28);	\
+	STORE(source, base, offset, 0x30);	\
+	STORE(source, base, offset, 0x38);
 
 #define ZERO_LAST_BLOCKS(base, offset, source)	\
-	std	source, [base - offset - 0x38]; \
-	std	source, [base - offset - 0x30]; \
-	std	source, [base - offset - 0x28]; \
-	std	source, [base - offset - 0x20]; \
-	std	source, [base - offset - 0x18]; \
-	std	source, [base - offset - 0x10]; \
-	std	source, [base - offset - 0x08]; \
-	std	source, [base - offset - 0x00];
+	STORE_LAST(source, base, offset, 0x38);	\
+	STORE_LAST(source, base, offset, 0x30); \
+	STORE_LAST(source, base, offset, 0x28);	\
+	STORE_LAST(source, base, offset, 0x20);	\
+	STORE_LAST(source, base, offset, 0x18);	\
+	STORE_LAST(source, base, offset, 0x10);	\
+	STORE_LAST(source, base, offset, 0x08);	\
+	STORE_LAST(source, base, offset, 0x00);
 
 	.text
 	.align 4
@@ -68,8 +77,6 @@ __bzero_begin:
 	.globl	memset
 	EXPORT_SYMBOL(__bzero)
 	EXPORT_SYMBOL(memset)
-	.globl	__memset_start, __memset_end
-__memset_start:
 memset:
 	mov	%o0, %g1
 	mov	1, %g4
@@ -122,8 +129,6 @@ __bzero:
 	ZERO_BIG_BLOCK(%o0, 0x00, %g2)
 	subcc	%o3, 128, %o3
 	ZERO_BIG_BLOCK(%o0, 0x40, %g2)
-11:
-	EXT(10b, 11b, 20f)
 	bne	10b
 	 add	%o0, 128, %o0
 
@@ -138,11 +143,9 @@ __bzero:
 	jmp	%o4
 	 add	%o0, %o2, %o0
 
-12:
 	ZERO_LAST_BLOCKS(%o0, 0x48, %g2)
 	ZERO_LAST_BLOCKS(%o0, 0x08, %g2)
 13:
-	EXT(12b, 13b, 21f)
 	be	8f
 	 andcc	%o1, 4, %g0
 
@@ -182,37 +185,13 @@ __bzero:
 5:
 	retl
 	 clr	%o0
-__memset_end:
 
 	.section .fixup,#alloc,#execinstr
 	.align	4
-20:
-	cmp	%g2, 8
-	bleu	1f
-	 and	%o1, 0x7f, %o1
-	sub	%g2, 9, %g2
-	add	%o3, 64, %o3
-1:
-	sll	%g2, 3, %g2
-	add	%o3, %o1, %o0
-	b 30f
-	 sub	%o0, %g2, %o0
-21:
-	mov	8, %o0
-	and	%o1, 7, %o1
-	sub	%o0, %g2, %o0
-	sll	%o0, 3, %o0
-	b 30f
-	 add	%o0, %o1, %o0
 30:
-/* %o4 is faulting address, %o5 is %pc where fault occurred */
-	save	%sp, -104, %sp
-	mov	%i5, %o0
-	mov	%i7, %o1
-	call	lookup_fault
-	 mov	%i4, %o2
-	ret
-	 restore
+	and	%o1, 0x7f, %o1
+	retl
+	 add	%o3, %o1, %o0
 
 	.globl __bzero_end
 __bzero_end:
diff --git a/arch/sparc/mm/Makefile b/arch/sparc/mm/Makefile
index 68db1f859b02..871354aa3c00 100644
--- a/arch/sparc/mm/Makefile
+++ b/arch/sparc/mm/Makefile
@@ -8,7 +8,7 @@ ccflags-y := -Werror
 obj-$(CONFIG_SPARC64)   += ultra.o tlb.o tsb.o
 obj-y                   += fault_$(BITS).o
 obj-y                   += init_$(BITS).o
-obj-$(CONFIG_SPARC32)   += extable.o srmmu.o iommu.o io-unit.o
+obj-$(CONFIG_SPARC32)   += srmmu.o iommu.o io-unit.o
 obj-$(CONFIG_SPARC32)   += srmmu_access.o
 obj-$(CONFIG_SPARC32)   += hypersparc.o viking.o tsunami.o swift.o
 obj-$(CONFIG_SPARC32)   += leon_mm.o
diff --git a/arch/sparc/mm/extable.c b/arch/sparc/mm/extable.c
deleted file mode 100644
index 241b40641873..000000000000
--- a/arch/sparc/mm/extable.c
+++ /dev/null
@@ -1,107 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * linux/arch/sparc/mm/extable.c
- */
-
-#include <linux/module.h>
-#include <linux/extable.h>
-#include <linux/uaccess.h>
-
-void sort_extable(struct exception_table_entry *start,
-		  struct exception_table_entry *finish)
-{
-}
-
-/* Caller knows they are in a range if ret->fixup == 0 */
-const struct exception_table_entry *
-search_extable(const struct exception_table_entry *base,
-	       const size_t num,
-	       unsigned long value)
-{
-	int i;
-
-	/* Single insn entries are encoded as:
-	 *	word 1:	insn address
-	 *	word 2:	fixup code address
-	 *
-	 * Range entries are encoded as:
-	 *	word 1: first insn address
-	 *	word 2: 0
-	 *	word 3: last insn address + 4 bytes
-	 *	word 4: fixup code address
-	 *
-	 * Deleted entries are encoded as:
-	 *	word 1: unused
-	 *	word 2: -1
-	 *
-	 * See asm/uaccess.h for more details.
-	 */
-
-	/* 1. Try to find an exact match. */
-	for (i = 0; i < num; i++) {
-		if (base[i].fixup == 0) {
-			/* A range entry, skip both parts. */
-			i++;
-			continue;
-		}
-
-		/* A deleted entry; see trim_init_extable */
-		if (base[i].fixup == -1)
-			continue;
-
-		if (base[i].insn == value)
-			return &base[i];
-	}
-
-	/* 2. Try to find a range match. */
-	for (i = 0; i < (num - 1); i++) {
-		if (base[i].fixup)
-			continue;
-
-		if (base[i].insn <= value && base[i + 1].insn > value)
-			return &base[i];
-
-		i++;
-	}
-
-        return NULL;
-}
-
-#ifdef CONFIG_MODULES
-/* We could memmove them around; easier to mark the trimmed ones. */
-void trim_init_extable(struct module *m)
-{
-	unsigned int i;
-	bool range;
-
-	for (i = 0; i < m->num_exentries; i += range ? 2 : 1) {
-		range = m->extable[i].fixup == 0;
-
-		if (within_module_init(m->extable[i].insn, m)) {
-			m->extable[i].fixup = -1;
-			if (range)
-				m->extable[i+1].fixup = -1;
-		}
-		if (range)
-			i++;
-	}
-}
-#endif /* CONFIG_MODULES */
-
-/* Special extable search, which handles ranges.  Returns fixup */
-unsigned long search_extables_range(unsigned long addr, unsigned long *g2)
-{
-	const struct exception_table_entry *entry;
-
-	entry = search_exception_tables(addr);
-	if (!entry)
-		return 0;
-
-	/* Inside range?  Fix g2 and return correct fixup */
-	if (!entry->fixup) {
-		*g2 = (addr - entry->insn) / 4;
-		return (entry + 1)->fixup;
-	}
-
-	return entry->fixup;
-}
diff --git a/arch/sparc/mm/fault_32.c b/arch/sparc/mm/fault_32.c
index 40ce087dfecf..de2031c2b2d7 100644
--- a/arch/sparc/mm/fault_32.c
+++ b/arch/sparc/mm/fault_32.c
@@ -23,6 +23,7 @@
 #include <linux/interrupt.h>
 #include <linux/kdebug.h>
 #include <linux/uaccess.h>
+#include <linux/extable.h>
 
 #include <asm/page.h>
 #include <asm/openprom.h>
@@ -54,54 +55,6 @@ static void __noreturn unhandled_fault(unsigned long address,
 	die_if_kernel("Oops", regs);
 }
 
-asmlinkage int lookup_fault(unsigned long pc, unsigned long ret_pc,
-			    unsigned long address)
-{
-	struct pt_regs regs;
-	unsigned long g2;
-	unsigned int insn;
-	int i;
-
-	i = search_extables_range(ret_pc, &g2);
-	switch (i) {
-	case 3:
-		/* load & store will be handled by fixup */
-		return 3;
-
-	case 1:
-		/* store will be handled by fixup, load will bump out */
-		/* for _to_ macros */
-		insn = *((unsigned int *) pc);
-		if ((insn >> 21) & 1)
-			return 1;
-		break;
-
-	case 2:
-		/* load will be handled by fixup, store will bump out */
-		/* for _from_ macros */
-		insn = *((unsigned int *) pc);
-		if (!((insn >> 21) & 1) || ((insn>>19)&0x3f) == 15)
-			return 2;
-		break;
-
-	default:
-		break;
-	}
-
-	memset(&regs, 0, sizeof(regs));
-	regs.pc = pc;
-	regs.npc = pc + 4;
-	__asm__ __volatile__(
-		"rd %%psr, %0\n\t"
-		"nop\n\t"
-		"nop\n\t"
-		"nop\n" : "=r" (regs.psr));
-	unhandled_fault(address, current, &regs);
-
-	/* Not reached */
-	return 0;
-}
-
 static inline void
 show_signal_msg(struct pt_regs *regs, int sig, int code,
 		unsigned long address, struct task_struct *tsk)
@@ -162,8 +115,6 @@ asmlinkage void do_sparc_fault(struct pt_regs *regs, int text_fault, int write,
 	struct vm_area_struct *vma;
 	struct task_struct *tsk = current;
 	struct mm_struct *mm = tsk->mm;
-	unsigned int fixup;
-	unsigned long g2;
 	int from_user = !(regs->psr & PSR_PS);
 	int code;
 	vm_fault_t fault;
@@ -281,30 +232,19 @@ bad_area_nosemaphore:
 
 	/* Is this in ex_table? */
 no_context:
-	g2 = regs->u_regs[UREG_G2];
 	if (!from_user) {
-		fixup = search_extables_range(regs->pc, &g2);
-		/* Values below 10 are reserved for other things */
-		if (fixup > 10) {
-			extern const unsigned int __memset_start[];
-			extern const unsigned int __memset_end[];
+		const struct exception_table_entry *entry;
 
+		entry = search_exception_tables(regs->pc);
 #ifdef DEBUG_EXCEPTIONS
-			printk("Exception: PC<%08lx> faddr<%08lx>\n",
-			       regs->pc, address);
-			printk("EX_TABLE: insn<%08lx> fixup<%08x> g2<%08lx>\n",
-				regs->pc, fixup, g2);
+		printk("Exception: PC<%08lx> faddr<%08lx>\n",
+		       regs->pc, address);
+		printk("EX_TABLE: insn<%08lx> fixup<%08x>\n",
+			regs->pc, entry->fixup);
 #endif
-			if ((regs->pc >= (unsigned long)__memset_start &&
-			     regs->pc < (unsigned long)__memset_end)) {
-				regs->u_regs[UREG_I4] = address;
-				regs->u_regs[UREG_I5] = regs->pc;
-			}
-			regs->u_regs[UREG_G2] = g2;
-			regs->pc = fixup;
-			regs->npc = regs->pc + 4;
-			return;
-		}
+		regs->pc = entry->fixup;
+		regs->npc = regs->pc + 4;
+		return;
 	}
 
 	unhandled_fault(address, tsk, regs);
diff --git a/arch/sparc/mm/mm_32.h b/arch/sparc/mm/mm_32.h
index ce750a99eea9..ee55f1080634 100644
--- a/arch/sparc/mm/mm_32.h
+++ b/arch/sparc/mm/mm_32.h
@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 /* fault_32.c - visible as they are called from assembler */
-asmlinkage int lookup_fault(unsigned long pc, unsigned long ret_pc,
-                            unsigned long address);
 asmlinkage void do_sparc_fault(struct pt_regs *regs, int text_fault, int write,
                                unsigned long address);