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23 October 2021, 00:29:24 UTC
Revision 1756954c61cb5c97c618ccb366482b9c1f891d6d authored by David Rientjes on 16 November 2012, 22:14:48 UTC, committed by Linus Torvalds on 16 November 2012, 22:33:03 UTC 
mm: fix build warning for uninitialized value
 
do_wp_page() sets mmun_called if mmun_start and mmun_end were
initialized and, if so, may call mmu_notifier_invalidate_range_end()
with these values.  This doesn't prevent gcc from emitting a build
warning though:

  mm/memory.c: In function `do_wp_page':
  mm/memory.c:2530: warning: `mmun_start' may be used uninitialized in this function
  mm/memory.c:2531: warning: `mmun_end' may be used uninitialized in this function

It's much easier to initialize the variables to impossible values and do
a simple comparison to determine if they were initialized to remove the
bool entirely.

Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 63c3b90
History
Tip revision: 1756954c61cb5c97c618ccb366482b9c1f891d6d authored by David Rientjes on 16 November 2012, 22:14:48 UTC
mm: fix build warning for uninitialized value
Tip revision: 1756954
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