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(parent: 6b10ebf) | patch
dm: use ACCESS_ONCE for sysfs values
authorMikulas Patocka <mpatocka@redhat.com>
Fri, 12 Oct 2012 15:59:46 +0000 (16:59 +0100)
committerAlasdair G Kergon <agk@redhat.com>
Fri, 12 Oct 2012 15:59:46 +0000 (16:59 +0100)
commit5bf5175281c3b596f3545dc713b335d1df06db9b
tree50332fca2fb4ff5851c4e1bfd8151d41ba83d781tree | snapshot
parent6b10ebf460ace0c374a76f5731bacd012055daa5commit | diff
dm: use ACCESS_ONCE for sysfs values

Use the ACCESS_ONCE macro in dm-bufio and dm-verity where a variable
can be modified asynchronously (through sysfs) and we want to prevent
compiler optimizations that assume that the variable hasn't changed.
(See Documentation/atomic_ops.txt.)

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
drivers/md/dm-bufio.c diff | blob | history
drivers/md/dm-verity.c diff | blob | history
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