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author | Steven Rostedt (VMware) <[email protected]> | 2017-02-24 14:59:10 -0800 |
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committer | Linus Torvalds <[email protected]> | 2017-02-24 17:46:56 -0800 |
commit | 3f472cc978ea019c7b09cc03f90b8ed6034efdf8 (patch) | |
tree | 7744f418e1d89fc85deb14e6613b9a201dcaeba8 /tools/perf/scripts/python/sched-migration.py | |
parent | c2f83143f1c67d186520b72b6cefbf0aa07a34ee (diff) |
mm/shmem.c: fix unlikely() test of info->seals to test only for WRITE and GROW
Running my likely/unlikely profiler, I discovered that the test in
shmem_write_begin() that tests for info->seals as unlikely, is always
incorrect. This is because shmem_get_inode() sets info->seals to have
F_SEAL_SEAL set by default, and it is unlikely to be cleared when
shmem_write_begin() is called. Thus, the if statement is very likely.
But as the if statement block only cares about F_SEAL_WRITE and
F_SEAL_GROW, change the test to only test those two bits.
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Steven Rostedt (VMware) <[email protected]>
Acked-by: Hugh Dickins <[email protected]>
Cc: David Herrmann <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/sched-migration.py')
0 files changed, 0 insertions, 0 deletions