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| author | Jan Beulich <jbeulich@suse.com> | 2012-03-23 13:58:58 +0000 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2012-03-23 13:58:58 +0000 |
| commit | e533312eed28c230ab2908c6dc370e59f0588992 (patch) | |
| tree | af9b9ab9e86f9825369fc9ce7333e3c83a766fb5 | |
| parent | e1271802210b57648146bd7fd515e40a30e58951 (diff) | |
| download | xen-e533312eed28c230ab2908c6dc370e59f0588992.tar.gz xen-e533312eed28c230ab2908c6dc370e59f0588992.tar.bz2 xen-e533312eed28c230ab2908c6dc370e59f0588992.zip | |
x86/gnttab: fix asm() operand in gnttab_clear_flag()
The operand needs to use the 'w' modifier in case the compiler happens
to pick a register (which apparently it does for no-one but the
reporter of this problem).
Reported-by: Lin Ming <mlin@ss.pku.edu.cn>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
xen-unstable changeset: 25092:a66fb91cb8d3
xen-unstable date: Fri Mar 23 08:39:39 2012 +0100
| -rw-r--r-- | xen/include/asm-x86/grant_table.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/xen/include/asm-x86/grant_table.h b/xen/include/asm-x86/grant_table.h index db8bfb46f2..3013869384 100644 --- a/xen/include/asm-x86/grant_table.h +++ b/xen/include/asm-x86/grant_table.h @@ -54,7 +54,7 @@ static inline void gnttab_clear_flag(unsigned int nr, uint16_t *st) * Note that this cannot be clear_bit(), as the access must be * confined to the specified 2 bytes. */ - asm volatile ("lock btrw %1,%0" : "=m" (*st) : "Ir" (nr), "m" (*st)); + asm volatile ("lock btrw %w1,%0" : "=m" (*st) : "Ir" (nr), "m" (*st)); } /* Foreign mappings of HHVM-guest pages do not modify the type count. */ |