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x86: Fix LOCK_PREFIX_HERE for uniprocessor build

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Checkin b3ac891b67:
x86: Add support for lock prefix in alternatives

... did not define LOCK_PREFIX_HERE in the case of a uniprocessor
build.  As a result, it would cause any of the usages of this macro to
fail on a uniprocessor build.  Fix this by defining LOCK_PREFIX_HERE
as a null string.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Luca Barbieri <luca@luca-barbieri.com>
LKML-Reference: <1267005265-27958-2-git-send-email-luca@luca-barbieri.com>
This commit is contained in:
H. Peter Anvin 2010-04-29 16:03:57 -07:00
parent a5c9161f27
commit b701a47ba4
1 changed files with 1 additions and 0 deletions
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arch/x86/include/asm/alternative.h
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@ -38,6 +38,7 @@
#define LOCK_PREFIX LOCK_PREFIX_HERE "\n\tlock; "
#else /* ! CONFIG_SMP */
#define LOCK_PREFIX_HERE ""
#define LOCK_PREFIX ""
#endif