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vfs: __predict common case in VFS_EPILOGUE/PROLOGUE

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NFS is the only in-tree filesystem using the feature, but all ops test
for it.

Currently the resulting sigdefer calls have to be jumped over in the
common case.

This is a bandaid, longer term fix will move this feature away.

Approved by:	re (kib)
This commit is contained in:
Mateusz Guzik 2018-09-22 11:39:30 +00:00
parent 061bbaf7e7
commit 334107b91b
1 changed files with 2 additions and 2 deletions
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4
sys/sys/signalvar.h
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@ -349,7 +349,7 @@ static inline int
sigdeferstop(int mode)
{
if (mode == SIGDEFERSTOP_NOP)
if (__predict_true(mode == SIGDEFERSTOP_NOP))
return (SIGDEFERSTOP_VAL_NCHG);
return (sigdeferstop_impl(mode));
}
@ -358,7 +358,7 @@ static inline void
sigallowstop(int prev)
{
if (prev == SIGDEFERSTOP_VAL_NCHG)
if (__predict_true(prev == SIGDEFERSTOP_VAL_NCHG))
return;
sigallowstop_impl(prev);
}