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tools/virtio: fix READ_ONCE()

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The virtio tools implementation of READ_ONCE() has a single parameter called
'var', but erroneously refers to 'val' for its cast, and thus won't work unless
there's a variable of the correct type that happens to be called 'var'.

Fix this with s/var/val/, making READ_ONCE() work as expected regardless.

Fixes: a7c490333d ("tools/virtio: use virt_xxx barriers")
Signed-off-by: Mark Rutland <[email protected]>
Cc: Jason Wang <[email protected]>
Cc: Michael S. Tsirkin <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Michael S. Tsirkin <[email protected]>
Reviewed-by: Cornelia Huck <[email protected]>
Reviewed-by: Jason Wang <[email protected]>
This commit is contained in:
Mark Rutland 2016-11-24 10:25:12 +00:00 • committed by Michael S. Tsirkin
commit 5da889c795
1 changed files with 1 additions and 1 deletions
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2
tools/virtio/linux/compiler.h
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@ -4,6 +4,6 @@
#define WRITE_ONCE(var, val) \
(*((volatile typeof(val) *)(&(var))) = (val))
#define READ_ONCE(var) (*((volatile typeof(val) *)(&(var))))
#define READ_ONCE(var) (*((volatile typeof(var) *)(&(var))))
#endif