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| author | Roger Pau Monné <roger.pau@citrix.com> | 2015-11-03 16:34:09 +0000 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2015-12-18 10:00:32 -0500 |
| commit | 1f13d75ccb806260079e0679d55d9253e370ec8a (patch) | |
| tree | a791cbe758b8c1c4feaf3a88603c7f96f7a4b7ba /arch/sh/include/asm/atomic.h | |
| parent | 68a33bfd8403e4e22847165d149823a2e0e67c9c (diff) | |
| download | linux-1f13d75ccb806260079e0679d55d9253e370ec8a.tar.bz2 | |
xen-blkback: only read request operation from shared ring once
A compiler may load a switch statement value multiple times, which could
be bad when the value is in memory shared with the frontend.
When converting a non-native request to a native one, ensure that
src->operation is only loaded once by using READ_ONCE().
This is part of XSA155.
CC: stable@vger.kernel.org
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch/sh/include/asm/atomic.h')
0 files changed, 0 insertions, 0 deletions