forked from luck/tmp_suning_uos_patched
5da889c795
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 <mark.rutland@arm.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: linux-kernel@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
10 lines
199 B
C
10 lines
199 B
C
#ifndef LINUX_COMPILER_H
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#define LINUX_COMPILER_H
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#define WRITE_ONCE(var, val) \
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(*((volatile typeof(val) *)(&(var))) = (val))
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#define READ_ONCE(var) (*((volatile typeof(var) *)(&(var))))
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#endif
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