From 78230477656295808c66226880d794818694e7f1 Mon Sep 17 00:00:00 2001 From: Chanwoo Choi Date: Mon, 13 Oct 2014 15:52:37 -0700 Subject: ARM: dts: fix wrong compatible string of Exynos3250 RTC dt node Fix wrong compatible string of Exynos3250 RTC (Real-Time Clock) dt node. The RTC of Exynos3250 must need additional source clock (XrtcXTI). Signed-off-by: Chanwoo Choi Acked-by: Kyungmin Park Cc: Alessandro Zummo Cc: Kukjin Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/arm/boot/dts/exynos3250.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch') diff --git a/arch/arm/boot/dts/exynos3250.dtsi b/arch/arm/boot/dts/exynos3250.dtsi index 1d52de6370d5..429a6c6cfcf9 100644 --- a/arch/arm/boot/dts/exynos3250.dtsi +++ b/arch/arm/boot/dts/exynos3250.dtsi @@ -164,7 +164,7 @@ }; rtc: rtc@10070000 { - compatible = "samsung,s3c6410-rtc"; + compatible = "samsung,exynos3250-rtc"; reg = <0x10070000 0x100>; interrupts = <0 73 0>, <0 74 0>; status = "disabled"; -- cgit v1.2.3 From 887f4f8666960dcf8c13d516ff3e4311353f3206 Mon Sep 17 00:00:00 2001 From: Baoquan He Date: Mon, 13 Oct 2014 15:53:37 -0700 Subject: arch/x86/purgatory/Makefile: try to use automatic variable in kexec purgatory makefile Make the Makefile of kexec purgatory be consistent with others in linux src tree, and make it look generic and simple. Signed-off-by: Baoquan He Cc: Vivek Goyal Cc: H. Peter Anvin Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Stephen Rothwell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/x86/purgatory/Makefile | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'arch') diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile index 899dd2454256..f52e033557c9 100644 --- a/arch/x86/purgatory/Makefile +++ b/arch/x86/purgatory/Makefile @@ -18,8 +18,9 @@ $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE targets += kexec-purgatory.c +CMD_BIN2C = $(objtree)/scripts/basic/bin2c quiet_cmd_bin2c = BIN2C $@ - cmd_bin2c = cat $(obj)/purgatory.ro | $(objtree)/scripts/basic/bin2c kexec_purgatory > $(obj)/kexec-purgatory.c + cmd_bin2c = $(CMD_BIN2C) kexec_purgatory < $< > $@ $(obj)/kexec-purgatory.c: $(obj)/purgatory.ro FORCE $(call if_changed,bin2c) -- cgit v1.2.3 From a2d6aa8fa0750fe1d2fc9673d4a46b2fd87e44b3 Mon Sep 17 00:00:00 2001 From: Baoquan He Date: Mon, 13 Oct 2014 15:53:42 -0700 Subject: kexec: check if crashk_res_low exists when exclude it from crash mem ranges Add a check if crashk_res_low exists just like GART region does. If crashk_res_low doesn't exist, calling exclude_mem_range is unnecessary. Meanwhile, since crashk_res_low has been initialized at definition, it's safe just use "if (crashk_low_res.end)" to check if it's exist. And this can make it consistent with other places of check. Signed-off-by: Baoquan He Acked-by: Vivek Goyal Cc: Eric W. Biederman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/x86/kernel/crash.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'arch') diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c index a618fcd2c07d..f5ab56d14287 100644 --- a/arch/x86/kernel/crash.c +++ b/arch/x86/kernel/crash.c @@ -237,7 +237,7 @@ static void fill_up_crash_elf_data(struct crash_elf_data *ced, ced->max_nr_ranges++; /* If crashk_low_res is not 0, another range split possible */ - if (crashk_low_res.end != 0) + if (crashk_low_res.end) ced->max_nr_ranges++; } @@ -335,9 +335,11 @@ static int elf_header_exclude_ranges(struct crash_elf_data *ced, if (ret) return ret; - ret = exclude_mem_range(cmem, crashk_low_res.start, crashk_low_res.end); - if (ret) - return ret; + if (crashk_low_res.end) { + ret = exclude_mem_range(cmem, crashk_low_res.start, crashk_low_res.end); + if (ret) + return ret; + } /* Exclude GART region */ if (ced->gart_end) { -- cgit v1.2.3 From f8da964dfbdca0eb14f9bf67be4ab6d256f90b7f Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Mon, 13 Oct 2014 15:53:46 -0700 Subject: kexec-bzimage64: fix sparse warnings David Howells brought to my attention the mails generated by kbuild test bot and following sparse warnings were present. This patch fixes these warnings. arch/x86/kernel/kexec-bzimage64.c:270:5: warning: symbol 'bzImage64_probe' was not declared. Should it be static? arch/x86/kernel/kexec-bzimage64.c:328:6: warning: symbol 'bzImage64_load' was not declared. Should it be static? arch/x86/kernel/kexec-bzimage64.c:517:5: warning: symbol 'bzImage64_cleanup' was not declared. Should it be static? arch/x86/kernel/kexec-bzimage64.c:531:5: warning: symbol 'bzImage64_verify_sig' was not declared. Should it be static? arch/x86/kernel/kexec-bzimage64.c:546:23: warning: symbol 'kexec_bzImage64_ops' was not declared. Should it be static? Signed-off-by: Vivek Goyal Reported-by: David Howells Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/x86/kernel/kexec-bzimage64.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) (limited to 'arch') diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c index 9642b9b33655..ca05f86481aa 100644 --- a/arch/x86/kernel/kexec-bzimage64.c +++ b/arch/x86/kernel/kexec-bzimage64.c @@ -26,6 +26,7 @@ #include #include #include +#include #define MAX_ELFCOREHDR_STR_LEN 30 /* elfcorehdr=0x<64bit-value> */ @@ -267,7 +268,7 @@ setup_boot_parameters(struct kimage *image, struct boot_params *params, return ret; } -int bzImage64_probe(const char *buf, unsigned long len) +static int bzImage64_probe(const char *buf, unsigned long len) { int ret = -ENOEXEC; struct setup_header *header; @@ -325,10 +326,10 @@ int bzImage64_probe(const char *buf, unsigned long len) return ret; } -void *bzImage64_load(struct kimage *image, char *kernel, - unsigned long kernel_len, char *initrd, - unsigned long initrd_len, char *cmdline, - unsigned long cmdline_len) +static void *bzImage64_load(struct kimage *image, char *kernel, + unsigned long kernel_len, char *initrd, + unsigned long initrd_len, char *cmdline, + unsigned long cmdline_len) { struct setup_header *header; @@ -514,7 +515,7 @@ out_free_params: } /* This cleanup function is called after various segments have been loaded */ -int bzImage64_cleanup(void *loader_data) +static int bzImage64_cleanup(void *loader_data) { struct bzimage64_data *ldata = loader_data; @@ -528,7 +529,7 @@ int bzImage64_cleanup(void *loader_data) } #ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG -int bzImage64_verify_sig(const char *kernel, unsigned long kernel_len) +static int bzImage64_verify_sig(const char *kernel, unsigned long kernel_len) { bool trusted; int ret; -- cgit v1.2.3 From 906e36c5c717cc99e622350f533876feed9bffe0 Mon Sep 17 00:00:00 2001 From: Mike Travis Date: Mon, 13 Oct 2014 15:54:05 -0700 Subject: x86: use optimized ioresource lookup in ioremap function Use the optimized ioresource lookup, "region_is_ram", for the ioremap function. If the region is not found, it falls back to the "page_is_ram" function. If it is found and it is RAM, then the usual warning message is issued, and the ioremap operation is aborted. Otherwise, the ioremap operation continues. Signed-off-by: Mike Travis Acked-by: Alex Thorlton Reviewed-by: Cliff Wickman Cc: Thomas Gleixner Cc: H. Peter Anvin Cc: Mark Salter Cc: Dave Young Cc: Rik van Riel Cc: Peter Zijlstra Cc: Mel Gorman Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/x86/mm/ioremap.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) (limited to 'arch') diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index baff1da354e0..af78e50ca6ce 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -86,6 +86,7 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr, pgprot_t prot; int retval; void __iomem *ret_addr; + int ram_region; /* Don't allow wraparound or zero size */ last_addr = phys_addr + size - 1; @@ -108,12 +109,23 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr, /* * Don't allow anybody to remap normal RAM that we're using.. */ - pfn = phys_addr >> PAGE_SHIFT; - last_pfn = last_addr >> PAGE_SHIFT; - if (walk_system_ram_range(pfn, last_pfn - pfn + 1, NULL, - __ioremap_check_ram) == 1) + /* First check if whole region can be identified as RAM or not */ + ram_region = region_is_ram(phys_addr, size); + if (ram_region > 0) { + WARN_ONCE(1, "ioremap on RAM at 0x%lx - 0x%lx\n", + (unsigned long int)phys_addr, + (unsigned long int)last_addr); return NULL; + } + /* If could not be identified(-1), check page by page */ + if (ram_region < 0) { + pfn = phys_addr >> PAGE_SHIFT; + last_pfn = last_addr >> PAGE_SHIFT; + if (walk_system_ram_range(pfn, last_pfn - pfn + 1, NULL, + __ioremap_check_ram) == 1) + return NULL; + } /* * Mappings have to be page-aligned */ -- cgit v1.2.3 From e48510f45107613bf14060eeabd658c49a044242 Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Mon, 13 Oct 2014 15:54:22 -0700 Subject: arch/x86/kernel/cpu/common.c: fix unused symbol warning x86_64 allnoconfig: arch/x86/kernel/cpu/common.c:968: warning: 'syscall32_cpu_init' defined but not used Cc: "H. Peter Anvin" Cc: Thomas Gleixner Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/x86/kernel/cpu/common.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'arch') diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index d8b1166c7888..8b699bff0099 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -964,6 +964,7 @@ static void vgetcpu_set_mode(void) vgetcpu_mode = VGETCPU_LSL; } +#ifdef CONFIG_IA32_EMULATION /* May not be __init: called during resume */ static void syscall32_cpu_init(void) { @@ -975,7 +976,8 @@ static void syscall32_cpu_init(void) wrmsrl(MSR_CSTAR, ia32_cstar_target); } -#endif +#endif /* CONFIG_IA32_EMULATION */ +#endif /* CONFIG_X86_64 */ #ifdef CONFIG_X86_32 void enable_sep_cpu(void) -- cgit v1.2.3 From 2bebf5cb4ea12164e7b15755baf423651e271146 Mon Sep 17 00:00:00 2001 From: Rasmus Villemoes Date: Mon, 13 Oct 2014 15:54:29 -0700 Subject: ARM: replace strnicmp with strncasecmp The kernel used to contain two functions for length-delimited, case-insensitive string comparison, strnicmp with correct semantics and a slightly buggy strncasecmp. The latter is the POSIX name, so strnicmp was renamed to strncasecmp, and strnicmp made into a wrapper for the new strncasecmp to avoid breaking existing users. To allow the compat wrapper strnicmp to be removed at some point in the future, and to avoid the extra indirection cost, do s/strnicmp/strncasecmp/g. Signed-off-by: Rasmus Villemoes Cc: Russell King Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/arm/mach-pxa/lpd270.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'arch') diff --git a/arch/arm/mach-pxa/lpd270.c b/arch/arm/mach-pxa/lpd270.c index 9f6ec167902a..ad777b353bd5 100644 --- a/arch/arm/mach-pxa/lpd270.c +++ b/arch/arm/mach-pxa/lpd270.c @@ -416,17 +416,17 @@ static struct pxafb_mach_info *lpd270_lcd_to_use; static int __init lpd270_set_lcd(char *str) { - if (!strnicmp(str, "lq057q3dc02", 11)) { + if (!strncasecmp(str, "lq057q3dc02", 11)) { lpd270_lcd_to_use = &sharp_lq057q3dc02; - } else if (!strnicmp(str, "lq121s1dg31", 11)) { + } else if (!strncasecmp(str, "lq121s1dg31", 11)) { lpd270_lcd_to_use = &sharp_lq121s1dg31; - } else if (!strnicmp(str, "lq036q1da01", 11)) { + } else if (!strncasecmp(str, "lq036q1da01", 11)) { lpd270_lcd_to_use = &sharp_lq036q1da01; - } else if (!strnicmp(str, "lq64d343", 8)) { + } else if (!strncasecmp(str, "lq64d343", 8)) { lpd270_lcd_to_use = &sharp_lq64d343; - } else if (!strnicmp(str, "lq10d368", 8)) { + } else if (!strncasecmp(str, "lq10d368", 8)) { lpd270_lcd_to_use = &sharp_lq10d368; - } else if (!strnicmp(str, "lq035q7db02-20", 14)) { + } else if (!strncasecmp(str, "lq035q7db02-20", 14)) { lpd270_lcd_to_use = &sharp_lq035q7db02_20; } else { printk(KERN_INFO "lpd270: unknown lcd panel [%s]\n", str); -- cgit v1.2.3 From bd5cfb8977fbb49d9350f7c81cf1516142e35a6a Mon Sep 17 00:00:00 2001 From: Xishi Qiu Date: Mon, 13 Oct 2014 15:55:07 -0700 Subject: arch/x86/mm/numa.c: fix boot failure when all nodes are hotpluggable If all the nodes are marked hotpluggable, alloc node data will fail. Because __next_mem_range_rev() will skip the hotpluggable memory regions. numa_clear_kernel_node_hotplug() is called after alloc node data. numa_init() ... ret = init_func(); // this will mark hotpluggable flag from SRAT ... memblock_set_bottom_up(false); ... ret = numa_register_memblks(&numa_meminfo); // this will alloc node data(pglist_data) ... numa_clear_kernel_node_hotplug(); // in case all the nodes are hotpluggable ... numa_register_memblks() setup_node_data() memblock_find_in_range_node() __memblock_find_range_top_down() for_each_mem_range_rev() __next_mem_range_rev() This patch moves numa_clear_kernel_node_hotplug() into numa_register_memblks(), clear kernel node hotpluggable flag before alloc node data, then alloc node data won't fail even all the nodes are hotpluggable. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Xishi Qiu Cc: Dave Jones Cc: Tang Chen Cc: Gu Zheng Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: Thomas Gleixner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/x86/mm/numa.c | 89 +++++++++++++++++++++++++++--------------------------- 1 file changed, 45 insertions(+), 44 deletions(-) (limited to 'arch') diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c index a32b706c401a..4e1e5709fe17 100644 --- a/arch/x86/mm/numa.c +++ b/arch/x86/mm/numa.c @@ -478,6 +478,42 @@ static bool __init numa_meminfo_cover_memory(const struct numa_meminfo *mi) return true; } +static void __init numa_clear_kernel_node_hotplug(void) +{ + int i, nid; + nodemask_t numa_kernel_nodes = NODE_MASK_NONE; + unsigned long start, end; + struct memblock_region *r; + + /* + * At this time, all memory regions reserved by memblock are + * used by the kernel. Set the nid in memblock.reserved will + * mark out all the nodes the kernel resides in. + */ + for (i = 0; i < numa_meminfo.nr_blks; i++) { + struct numa_memblk *mb = &numa_meminfo.blk[i]; + + memblock_set_node(mb->start, mb->end - mb->start, + &memblock.reserved, mb->nid); + } + + /* Mark all kernel nodes. */ + for_each_memblock(reserved, r) + node_set(r->nid, numa_kernel_nodes); + + /* Clear MEMBLOCK_HOTPLUG flag for memory in kernel nodes. */ + for (i = 0; i < numa_meminfo.nr_blks; i++) { + nid = numa_meminfo.blk[i].nid; + if (!node_isset(nid, numa_kernel_nodes)) + continue; + + start = numa_meminfo.blk[i].start; + end = numa_meminfo.blk[i].end; + + memblock_clear_hotplug(start, end - start); + } +} + static int __init numa_register_memblks(struct numa_meminfo *mi) { unsigned long uninitialized_var(pfn_align); @@ -495,6 +531,15 @@ static int __init numa_register_memblks(struct numa_meminfo *mi) &memblock.memory, mb->nid); } + /* + * At very early time, the kernel have to use some memory such as + * loading the kernel image. We cannot prevent this anyway. So any + * node the kernel resides in should be un-hotpluggable. + * + * And when we come here, alloc node data won't fail. + */ + numa_clear_kernel_node_hotplug(); + /* * If sections array is gonna be used for pfn -> nid mapping, check * whether its granularity is fine enough. @@ -554,41 +599,6 @@ static void __init numa_init_array(void) } } -static void __init numa_clear_kernel_node_hotplug(void) -{ - int i, nid; - nodemask_t numa_kernel_nodes = NODE_MASK_NONE; - unsigned long start, end; - struct memblock_region *r; - - /* - * At this time, all memory regions reserved by memblock are - * used by the kernel. Set the nid in memblock.reserved will - * mark out all the nodes the kernel resides in. - */ - for (i = 0; i < numa_meminfo.nr_blks; i++) { - struct numa_memblk *mb = &numa_meminfo.blk[i]; - memblock_set_node(mb->start, mb->end - mb->start, - &memblock.reserved, mb->nid); - } - - /* Mark all kernel nodes. */ - for_each_memblock(reserved, r) - node_set(r->nid, numa_kernel_nodes); - - /* Clear MEMBLOCK_HOTPLUG flag for memory in kernel nodes. */ - for (i = 0; i < numa_meminfo.nr_blks; i++) { - nid = numa_meminfo.blk[i].nid; - if (!node_isset(nid, numa_kernel_nodes)) - continue; - - start = numa_meminfo.blk[i].start; - end = numa_meminfo.blk[i].end; - - memblock_clear_hotplug(start, end - start); - } -} - static int __init numa_init(int (*init_func)(void)) { int i; @@ -643,15 +653,6 @@ static int __init numa_init(int (*init_func)(void)) } numa_init_array(); - /* - * At very early time, the kernel have to use some memory such as - * loading the kernel image. We cannot prevent this anyway. So any - * node the kernel resides in should be un-hotpluggable. - * - * And when we come here, numa_init() won't fail. - */ - numa_clear_kernel_node_hotplug(); - return 0; } -- cgit v1.2.3 From 9919e39a17381058dd0cdef2f78dbf5619e26474 Mon Sep 17 00:00:00 2001 From: Ulrich Obergfell Date: Mon, 13 Oct 2014 15:55:37 -0700 Subject: kvm: ensure hard lockup detection is disabled by default Use watchdog_enable_hardlockup_detector() to set hard lockup detection's default value to false. It's risky to run this detection in a guest, as false positives are easy to trigger, especially if the host is overcommitted. Signed-off-by: Ulrich Obergfell Signed-off-by: Andrew Jones Signed-off-by: Don Zickus Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/x86/kernel/kvm.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'arch') diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c index 3dd8e2c4d74a..95c3cb16af3e 100644 --- a/arch/x86/kernel/kvm.c +++ b/arch/x86/kernel/kvm.c @@ -35,6 +35,7 @@ #include #include #include +#include #include #include #include @@ -499,6 +500,13 @@ void __init kvm_guest_init(void) #else kvm_guest_cpu_init(); #endif + + /* + * Hard lockup detection is enabled by default. Disable it, as guests + * can get false positives too easily, for example if the host is + * overcommitted. + */ + watchdog_enable_hardlockup_detector(false); } static noinline uint32_t __kvm_cpuid_base(void) -- cgit v1.2.3 From bd6aa7e51aea1bf58c4a917630dae31def11bd2d Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Mon, 13 Oct 2014 15:55:39 -0700 Subject: frv: remove unused declarations of __start___ex_table and __stop___ex_table Signed-off-by: Geert Uytterhoeven Acked-by: David Howells Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/frv/mm/extable.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'arch') diff --git a/arch/frv/mm/extable.c b/arch/frv/mm/extable.c index 6aea124f574d..2fb9b3ab57b9 100644 --- a/arch/frv/mm/extable.c +++ b/arch/frv/mm/extable.c @@ -6,8 +6,6 @@ #include #include -extern const struct exception_table_entry __attribute__((aligned(8))) __start___ex_table[]; -extern const struct exception_table_entry __attribute__((aligned(8))) __stop___ex_table[]; extern const void __memset_end, __memset_user_error_lr, __memset_user_error_handler; extern const void __memcpy_end, __memcpy_user_error_lr, __memcpy_user_error_handler; extern spinlock_t modlist_lock; -- cgit v1.2.3 From 4c6327dfaf20d6207efa765320748fd8699f74b0 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Mon, 13 Oct 2014 15:55:41 -0700 Subject: ia64: remove duplicate declarations of __per_cpu_start[] and __per_cpu_end[] They're already provided by . Signed-off-by: Geert Uytterhoeven Cc: "Luck, Tony" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/ia64/include/asm/sections.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch') diff --git a/arch/ia64/include/asm/sections.h b/arch/ia64/include/asm/sections.h index 1a873b36a4a1..2ab2003698ef 100644 --- a/arch/ia64/include/asm/sections.h +++ b/arch/ia64/include/asm/sections.h @@ -10,7 +10,7 @@ #include #include -extern char __per_cpu_start[], __per_cpu_end[], __phys_per_cpu_start[]; +extern char __phys_per_cpu_start[]; #ifdef CONFIG_SMP extern char __cpu0_per_cpu[]; #endif -- cgit v1.2.3