mm: avoid uninitialized variable in tracepoint
authorArnd Bergmann <arnd@arndb.de>
Mon, 18 Jan 2016 20:50:26 +0000 (21:50 +0100)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 20 Jan 2016 17:21:41 +0000 (09:21 -0800)
commit629d9d1cafbd49cb374561a5a7d7724c4d6b2567
treee0d107e5041480d2097e8b02cad4f1ba563ddf58
parent2b4015e9fb335aa6982a68dbe6e4158d6c1b10ee
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>
mm/huge_memory.c