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-rw-r--r--arch/arm/Kconfig1
-rw-r--r--arch/arm/boot/compressed/Makefile7
-rw-r--r--arch/arm/boot/compressed/head.S2
-rw-r--r--arch/arm/boot/compressed/vmlinux.lds.S11
-rw-r--r--arch/arm/include/asm/dma-mapping.h7
-rw-r--r--arch/arm/include/asm/highmem.h1
-rw-r--r--arch/arm/kernel/atags_parse.c7
-rw-r--r--arch/arm/kernel/debug.S39
-rw-r--r--arch/arm/kernel/early_printk.c16
-rw-r--r--arch/arm/kernel/entry-common.S9
-rw-r--r--arch/arm/kernel/setup.c10
-rw-r--r--arch/arm/mm/dma-mapping.c21
-rw-r--r--arch/arm/mm/init.c10
13 files changed, 69 insertions, 72 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 7888c9803eb0..979aac3e2fbf 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -2,6 +2,7 @@ config ARM
bool
default y
select ARCH_CLOCKSOURCE_DATA
+ select ARCH_DISCARD_MEMBLOCK if !HAVE_ARCH_PFN_VALID
select ARCH_HAS_DEBUG_VIRTUAL
select ARCH_HAS_DEVMEM_IS_ALLOWED
select ARCH_HAS_ELF_RANDOMIZE
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index d50430c40045..9519ce3d2e1c 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -116,8 +116,11 @@ ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj)
asflags-y := -DZIMAGE
# Supply kernel BSS size to the decompressor via a linker symbol.
-KBSS_SZ = $(shell $(CROSS_COMPILE)size $(obj)/../../../../vmlinux | \
- awk 'END{print $$3}')
+KBSS_SZ = $(shell $(CROSS_COMPILE)nm $(obj)/../../../../vmlinux | \
+ perl -e 'while (<>) { \
+ $$bss_start=hex($$1) if /^([[:xdigit:]]+) B __bss_start$$/; \
+ $$bss_end=hex($$1) if /^([[:xdigit:]]+) B __bss_stop$$/; \
+ }; printf "%d\n", $$bss_end - $$bss_start;')
LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ)
# Supply ZRELADDR to the decompressor via a linker symbol.
ifneq ($(CONFIG_AUTO_ZRELADDR),y)
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
index 8a756870c238..45c8823c3750 100644
--- a/arch/arm/boot/compressed/head.S
+++ b/arch/arm/boot/compressed/head.S
@@ -143,6 +143,8 @@ start:
.word _magic_start @ absolute load/run zImage address
.word _magic_end @ zImage end address
.word 0x04030201 @ endianness flag
+ .word 0x45454545 @ another magic number to indicate
+ .word _magic_table @ additional data table
__EFI_HEADER
1:
diff --git a/arch/arm/boot/compressed/vmlinux.lds.S b/arch/arm/boot/compressed/vmlinux.lds.S
index 7d06aa19c3e6..e6bf6774c4bb 100644
--- a/arch/arm/boot/compressed/vmlinux.lds.S
+++ b/arch/arm/boot/compressed/vmlinux.lds.S
@@ -44,12 +44,22 @@ SECTIONS
*(.glue_7t)
*(.glue_7)
}
+ .table : ALIGN(4) {
+ _table_start = .;
+ LONG(ZIMAGE_MAGIC(2))
+ LONG(ZIMAGE_MAGIC(0x5a534c4b))
+ LONG(ZIMAGE_MAGIC(__piggy_size_addr - _start))
+ LONG(ZIMAGE_MAGIC(_kernel_bss_size))
+ LONG(0)
+ _table_end = .;
+ }
.rodata : {
*(.rodata)
*(.rodata.*)
}
.piggydata : {
*(.piggydata)
+ __piggy_size_addr = . - 4;
}
. = ALIGN(4);
@@ -97,6 +107,7 @@ SECTIONS
_magic_sig = ZIMAGE_MAGIC(0x016f2818);
_magic_start = ZIMAGE_MAGIC(_start);
_magic_end = ZIMAGE_MAGIC(_edata);
+ _magic_table = ZIMAGE_MAGIC(_table_start - _start);
. = BSS_START;
__bss_start = .;
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 4e0285a66ef8..462803f3a6a0 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -190,13 +190,6 @@ extern int arm_dma_mmap(struct device *dev, struct vm_area_struct *vma,
unsigned long attrs);
/*
- * This can be called during early boot to increase the size of the atomic
- * coherent DMA pool above the default value of 256KiB. It must be called
- * before postcore_initcall.
- */
-extern void __init init_dma_coherent_pool_size(unsigned long size);
-
-/*
* For SA-1111, IXP425, and ADI systems the dma-mapping functions are "magic"
* and utilize bounce buffers as needed to work around limited DMA windows.
*
diff --git a/arch/arm/include/asm/highmem.h b/arch/arm/include/asm/highmem.h
index 0a0e2d1784c0..61736fdccc79 100644
--- a/arch/arm/include/asm/highmem.h
+++ b/arch/arm/include/asm/highmem.h
@@ -18,7 +18,6 @@
} while (0)
extern pte_t *pkmap_page_table;
-extern pte_t *fixmap_page_table;
extern void *kmap_high(struct page *page);
extern void kunmap_high(struct page *page);
diff --git a/arch/arm/kernel/atags_parse.c b/arch/arm/kernel/atags_parse.c
index 98fbfd235ac8..c10a3e8ee998 100644
--- a/arch/arm/kernel/atags_parse.c
+++ b/arch/arm/kernel/atags_parse.c
@@ -196,11 +196,8 @@ setup_machine_tags(phys_addr_t __atags_pointer, unsigned int machine_nr)
break;
}
- if (!mdesc) {
- early_print("\nError: unrecognized/unsupported machine ID"
- " (r1 = 0x%08x).\n\n", machine_nr);
- dump_machine_table(); /* does not return */
- }
+ if (!mdesc)
+ return NULL;
if (__atags_pointer)
tags = phys_to_virt(__atags_pointer);
diff --git a/arch/arm/kernel/debug.S b/arch/arm/kernel/debug.S
index 0a498cb3fad8..b795dc2408c0 100644
--- a/arch/arm/kernel/debug.S
+++ b/arch/arm/kernel/debug.S
@@ -55,7 +55,9 @@ ENDPROC(printhex4)
ENTRY(printhex2)
mov r1, #2
-printhex: adr r2, hexbuf
+printhex: adr r2, hexbuf_rel
+ ldr r3, [r2]
+ add r2, r2, r3
add r3, r2, r1
mov r1, #0
strb r1, [r3]
@@ -71,7 +73,11 @@ printhex: adr r2, hexbuf
b printascii
ENDPROC(printhex2)
-hexbuf: .space 16
+ .pushsection .bss
+hexbuf_addr: .space 16
+ .popsection
+ .align
+hexbuf_rel: .long hexbuf_addr - .
.ltorg
@@ -79,25 +85,28 @@ hexbuf: .space 16
ENTRY(printascii)
addruart_current r3, r1, r2
- b 2f
-1: waituart r2, r3
- senduart r1, r3
- busyuart r2, r3
- teq r1, #'\n'
- moveq r1, #'\r'
- beq 1b
-2: teq r0, #0
+1: teq r0, #0
ldrneb r1, [r0], #1
teqne r1, #0
- bne 1b
- ret lr
+ reteq lr
+2: teq r1, #'\n'
+ bne 3f
+ mov r1, #'\r'
+ waituart r2, r3
+ senduart r1, r3
+ busyuart r2, r3
+ mov r1, #'\n'
+3: waituart r2, r3
+ senduart r1, r3
+ busyuart r2, r3
+ b 1b
ENDPROC(printascii)
ENTRY(printch)
addruart_current r3, r1, r2
mov r1, r0
mov r0, #0
- b 1b
+ b 2b
ENDPROC(printch)
#ifdef CONFIG_MMU
@@ -124,7 +133,9 @@ ENTRY(printascii)
ENDPROC(printascii)
ENTRY(printch)
- adr r1, hexbuf
+ adr r1, hexbuf_rel
+ ldr r2, [r1]
+ add r1, r1, r2
strb r0, [r1]
mov r0, #0x03 @ SYS_WRITEC
ARM( svc #0x123456 )
diff --git a/arch/arm/kernel/early_printk.c b/arch/arm/kernel/early_printk.c
index 43076536965c..9257736ec9fa 100644
--- a/arch/arm/kernel/early_printk.c
+++ b/arch/arm/kernel/early_printk.c
@@ -11,16 +11,20 @@
#include <linux/kernel.h>
#include <linux/console.h>
#include <linux/init.h>
+#include <linux/string.h>
-extern void printch(int);
+extern void printascii(const char *);
static void early_write(const char *s, unsigned n)
{
- while (n-- > 0) {
- if (*s == '\n')
- printch('\r');
- printch(*s);
- s++;
+ char buf[128];
+ while (n) {
+ unsigned l = min(n, sizeof(buf)-1);
+ memcpy(buf, s, l);
+ buf[l] = 0;
+ s += l;
+ n -= l;
+ printascii(buf);
}
}
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index ca3614dc6938..cc70bc5650a5 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -394,17 +394,8 @@ ENDPROC(sys_fstatfs64_wrapper)
* offset, we return EINVAL.
*/
sys_mmap2:
-#if PAGE_SHIFT > 12
- tst r5, #PGOFF_MASK
- moveq r5, r5, lsr #PAGE_SHIFT - 12
- streq r5, [sp, #4]
- beq sys_mmap_pgoff
- mov r0, #-EINVAL
- ret lr
-#else
str r5, [sp, #4]
b sys_mmap_pgoff
-#endif
ENDPROC(sys_mmap2)
#ifdef CONFIG_OABI_COMPAT
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 8e9a3e40d949..fc40a2b40595 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -1069,6 +1069,16 @@ void __init setup_arch(char **cmdline_p)
mdesc = setup_machine_fdt(__atags_pointer);
if (!mdesc)
mdesc = setup_machine_tags(__atags_pointer, __machine_arch_type);
+ if (!mdesc) {
+ early_print("\nError: invalid dtb and unrecognized/unsupported machine ID\n");
+ early_print(" r1=0x%08x, r2=0x%08x\n", __machine_arch_type,
+ __atags_pointer);
+ if (__atags_pointer)
+ early_print(" r2[]=%*ph\n", 16,
+ phys_to_virt(__atags_pointer));
+ dump_machine_table();
+ }
+
machine_desc = mdesc;
machine_name = mdesc->name;
dump_stack_set_arch_desc("%s", mdesc->name);
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index fcf1473d6fed..ada8eb206a90 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -382,9 +382,9 @@ static void __dma_free_remap(void *cpu_addr, size_t size)
}
#define DEFAULT_DMA_COHERENT_POOL_SIZE SZ_256K
-static struct gen_pool *atomic_pool;
+static struct gen_pool *atomic_pool __ro_after_init;
-static size_t atomic_pool_size = DEFAULT_DMA_COHERENT_POOL_SIZE;
+static size_t atomic_pool_size __initdata = DEFAULT_DMA_COHERENT_POOL_SIZE;
static int __init early_coherent_pool(char *p)
{
@@ -393,21 +393,6 @@ static int __init early_coherent_pool(char *p)
}
early_param("coherent_pool", early_coherent_pool);
-void __init init_dma_coherent_pool_size(unsigned long size)
-{
- /*
- * Catch any attempt to set the pool size too late.
- */
- BUG_ON(atomic_pool);
-
- /*
- * Set architecture specific coherent pool size only if
- * it has not been changed by kernel command line parameter.
- */
- if (atomic_pool_size == DEFAULT_DMA_COHERENT_POOL_SIZE)
- atomic_pool_size = size;
-}
-
/*
* Initialise the coherent pool for atomic allocations.
*/
@@ -443,7 +428,7 @@ static int __init atomic_pool_init(void)
gen_pool_set_algo(atomic_pool,
gen_pool_first_fit_order_align,
- (void *)PAGE_SHIFT);
+ NULL);
pr_info("DMA: preallocated %zu KiB pool for atomic coherent allocations\n",
atomic_pool_size / 1024);
return 0;
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index ad80548325fe..81d4482b6861 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -580,16 +580,6 @@ void __init mem_init(void)
BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET);
BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET);
#endif
-
- if (PAGE_SIZE >= 16384 && get_num_physpages() <= 128) {
- extern int sysctl_overcommit_memory;
- /*
- * On a machine this small we won't get
- * anywhere without overcommit, so turn
- * it on by default.
- */
- sysctl_overcommit_memory = OVERCOMMIT_ALWAYS;
- }
}
#ifdef CONFIG_STRICT_KERNEL_RWX
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-30 23:13:02 +0000