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| author |   Punit Agrawal <punit.agrawal@arm.com> | 2014-09-01 17:16:01 +0100 |
|---|---|---|
| committer |   Russell King <rmk+kernel@arm.linux.org.uk> | 2014-09-12 17:38:58 +0100 |
| commit | e918a62a2ba81d10a3cc2c513dc70034c9524a95 (patch) | |
| tree | 6f2c9f379f791a251319be69149d0061b5672aeb /arch/arm/include/asm/uaccess.h | |
| parent | ARM: 8133/1: use irq_set_affinity with force=false when migrating irqs (diff) | |
| download | linux-dev-e918a62a2ba81d10a3cc2c513dc70034c9524a95.tar.xz linux-dev-e918a62a2ba81d10a3cc2c513dc70034c9524a95.zip | |
ARM: 8135/1: Fix in-correct barrier usage in SWP{B} emulation
According to the ARM ARMv7, explicit barriers are necessary when using
synchronisation primitives such as SWP{B}. The use of these
instructions does not automatically imply a barrier and any ordering
requirements by the software must be explicitly expressed with the use
of suitable barriers.
Based on this, remove the barriers from SWP{B} emulation.
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/uaccess.h')
0 files changed, 0 insertions, 0 deletions