Author: mjg
Date: Sun Feb 5 01:40:27 2017
New Revision: 313260
URL: https://svnweb.freebsd.org/changeset/base/313260
Log:
fd: switch fget_unlocked to atomic_fcmpset
Modified:
head/sys/kern/kern_descrip.c
Modified: head/sys/kern/kern_descrip.c
==============================================================================
--- head/sys/kern/kern_descrip.c Sun Feb 5 01:20:39 2017
(r313259)
+++ head/sys/kern/kern_descrip.c Sun Feb 5 01:40:27 2017
(r313260)
@@ -2569,8 +2569,8 @@ fget_unlocked(struct filedesc *fdp, int
if (error != 0)
return (error);
#endif
- retry:
count = fp->f_count;
+ retry:
if (count == 0) {
/*
* Force a reload. Other thread could reallocate the
@@ -2584,7 +2584,7 @@ fget_unlocked(struct filedesc *fdp, int
* Use an acquire barrier to force re-reading of fdt so it is
* refreshed for verification.
*/
- if (atomic_cmpset_acq_int(&fp->f_count, count, count + 1) == 0)
+ if (atomic_fcmpset_acq_int(&fp->f_count, &count, count + 1) ==
0)
goto retry;
fdt = fdp->fd_files;
#ifdef CAPABILITIES
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