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| author | Stefan Weil <sw@weilnetz.de> | 2012-10-03 23:11:02 +0200 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2012-10-05 08:00:22 -0500 |
| commit | 610b823ef66b993660f1ab1447a769f190e4f3b3 (patch) | |
| tree | d0b4e09c4857e4003ddf8b2da7c03d2374c3cb19 /qemu-barrier.h | |
| parent | 9b9e3ec1b47f615f635055924e24705cc3f45b20 (diff) | |
| download | qemu-610b823ef66b993660f1ab1447a769f190e4f3b3.zip qemu-610b823ef66b993660f1ab1447a769f190e4f3b3.tar.gz qemu-610b823ef66b993660f1ab1447a769f190e4f3b3.tar.bz2 | |
qemu-barrier: Fix compiler version check for future gcc versions
The current check will give a wrong result for gcc-5.x with x < 4.
Using QEMU_GNUC_PREREQ is simpler and fixes that issue.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'qemu-barrier.h')
| -rw-r--r-- | qemu-barrier.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/qemu-barrier.h b/qemu-barrier.h index 7e11197..16f0942 100644 --- a/qemu-barrier.h +++ b/qemu-barrier.h @@ -19,7 +19,7 @@ * mfence on 32 bit as well, e.g. if built with -march=pentium-m. * However, on i386, there seem to be known bugs as recently as 4.3. * */ -#if defined(__GNUC__) && __GNUC__ >= 4 && __GNUC_MINOR__ >= 4 +#if QEMU_GNUC_PREREQ(4, 4) #define smp_mb() __sync_synchronize() #else #define smp_mb() asm volatile("lock; addl $0,0(%%esp) " ::: "memory") |