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Date: Sat, 19 Dec 2009 11:48:42 +0100 From: Andi Kleen <andi@...stfloor.org> To: torvalds@...ux-foundation.org, akpm@...l.org, linux-kernel@...r.kernel.org, mingo@...e.hu Subject: [PATCH] HWPOISON: Add PROC_FS dependency to hwpoison injector v2 Hi Linus, This fixes a obscure build problem with the hwpoison injector code, found by Ingo's tip compilation testing. The injector requires PROC_FS and doesn't build when it is disabled. Add suitable dependencies and ifdefs. Please apply. Thanks, -Andi --- HWPOISON: Add PROC_FS dependency to hwpoison injector v2 The injector filter requires stable_page_flags() which is supplied by procfs. So make it dependent on that. Also add ifdefs around the filter code in memory-failure.c so that when the filter is disabled due to missing dependencies the whole code still builds. Reported-by: Ingo Molnar Signed-off-by: Andi Kleen <ak@...ux.intel.com> --- mm/Kconfig | 2 +- mm/memory-failure.c | 9 +++++++++ 2 files changed, 10 insertions(+), 1 deletion(-) Index: linux/mm/Kconfig =================================================================== --- linux.orig/mm/Kconfig +++ linux/mm/Kconfig @@ -252,7 +252,7 @@ config MEMORY_FAILURE config HWPOISON_INJECT tristate "HWPoison pages injector" - depends on MEMORY_FAILURE && DEBUG_KERNEL + depends on MEMORY_FAILURE && DEBUG_KERNEL && PROC_FS select PROC_PAGE_MONITOR config NOMMU_INITIAL_TRIM_EXCESS Index: linux/mm/memory-failure.c =================================================================== --- linux.orig/mm/memory-failure.c +++ linux/mm/memory-failure.c @@ -52,6 +52,8 @@ int sysctl_memory_failure_recovery __rea atomic_long_t mce_bad_pages __read_mostly = ATOMIC_LONG_INIT(0); +#if defined(CONFIG_HWPOISON_INJECT) || defined(CONFIG_HWPOISON_INJECT_MODULE) + u32 hwpoison_filter_enable = 0; u32 hwpoison_filter_dev_major = ~0U; u32 hwpoison_filter_dev_minor = ~0U; @@ -164,6 +166,13 @@ int hwpoison_filter(struct page *p) return 0; } +#else +int hwpoison_filter(struct page *p) +{ + return 0; +} +#endif + EXPORT_SYMBOL_GPL(hwpoison_filter); /* -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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