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@linux.intel.com>
diff --git a/mm/Kconfig b/mm/Kconfig
index ee9f3e0..17b8947 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -253,7 +253,7 @@
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
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 6a0466e..17299fd 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -52,6 +52,8 @@
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 @@
return 0;
}
+#else
+int hwpoison_filter(struct page *p)
+{
+ return 0;
+}
+#endif
+
EXPORT_SYMBOL_GPL(hwpoison_filter);
/*