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| author | Alexey Kopytov <akopytov@gmail.com> | 2015-05-26 23:56:00 +0300 |
|---|---|---|
| committer | Alexey Kopytov <akopytov@gmail.com> | 2015-05-26 23:56:00 +0300 |
| commit | 70bc0a3ef40b1b9348750c12ca5df8f0863b7cfd (patch) | |
| tree | 0fddb6c0905064a5d5e6184c849d6c169aba409d /storage/innobase/include/os0sync.h | |
| parent | 17a37796e1947e2227824416d297a746a1dc6c26 (diff) | |
| download | mariadb-git-70bc0a3ef40b1b9348750c12ca5df8f0863b7cfd.tar.gz | |
Fixes MDEV-7658: MDEV-7026 fix reintroduces MDEV-6615 on AArch64
This is an addendum to the fix for MDEV-7026. The ARM memory model is
similar to that of PowerPC and thus needs the same semantics with
respect to memory barriers. That is, os_atomic_test_and_set_*_release()
must be a store with a release barrier followed by a full
barrier. Unlike x86 using __sync_lock_test_and_set() which is
implemented as “exclusive load with acquire barriers + exclusive store”
is insufficient in contexts where os_atomic_test_and_set_*_release()
macros are used.
Diffstat (limited to 'storage/innobase/include/os0sync.h')
| -rw-r--r-- | storage/innobase/include/os0sync.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/storage/innobase/include/os0sync.h b/storage/innobase/include/os0sync.h index 6f090c4b1b4..7fd1fde5e76 100644 --- a/storage/innobase/include/os0sync.h +++ b/storage/innobase/include/os0sync.h @@ -324,7 +324,7 @@ amount of increment. */ /**********************************************************//** Returns the old value of *ptr, atomically sets *ptr to new_val */ -#ifdef __powerpc__ +#if defined(__powerpc__) || defined(__aarch64__) /* os_atomic_test_and_set_byte_release() should imply a release barrier before setting, and a full barrier after. But __sync_lock_test_and_set() is only |