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authorArnd Bergmann <arnd@arndb.de>2016-01-18 21:50:26 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-20 09:21:41 -0800
commit629d9d1cafbd49cb374561a5a7d7724c4d6b2567 (patch)
treee0d107e5041480d2097e8b02cad4f1ba563ddf58 /mm
parent2b4015e9fb335aa6982a68dbe6e4158d6c1b10ee (diff)
downloadlinux-next-629d9d1cafbd49cb374561a5a7d7724c4d6b2567.tar.gz
mm: avoid uninitialized variable in tracepoint
A newly added tracepoint in the hugepage code uses a variable in the error handling that is not initialized at that point: include/trace/events/huge_memory.h:81:230: error: 'isolated' may be used uninitialized in this function [-Werror=maybe-uninitialized] The result is relatively harmless, as the trace data will in rare cases contain incorrect data. This works around the problem by adding an explicit initialization. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 7d2eba0557c1 ("mm: add tracepoint for scanning pages") Reviewed-by: Ebru Akagunduz <ebru.akagunduz@gmail.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Kirill A. Shutemov <kirill@shutemov.name> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/huge_memory.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 50342eff7960..b1cf73bc3b12 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2320,7 +2320,7 @@ static void collapse_huge_page(struct mm_struct *mm,
pgtable_t pgtable;
struct page *new_page;
spinlock_t *pmd_ptl, *pte_ptl;
- int isolated, result = 0;
+ int isolated = 0, result = 0;
unsigned long hstart, hend;
struct mem_cgroup *memcg;
unsigned long mmun_start; /* For mmu_notifiers */