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author | Will Deacon <will.deacon@arm.com> | 2013-02-04 12:12:33 +0000 |
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committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-02-11 18:16:41 +0000 |
commit | 3a0310eb369aae985d6409d8ff1340146578e5c1 (patch) | |
tree | 8b1796a500d2dd694c924a57ee4502f31b15ef8b /drivers/net/ieee802154 | |
parent | c0e01d5d8f15c085236df184e5bc3d79a8b700cd (diff) | |
download | blackbird-op-linux-3a0310eb369aae985d6409d8ff1340146578e5c1.tar.gz blackbird-op-linux-3a0310eb369aae985d6409d8ff1340146578e5c1.zip |
arm64: atomics: fix grossly inconsistent asm constraints for exclusives
Our uses of inline asm constraints for atomic operations are fairly
wild and varied. We basically need to guarantee the following:
1. Any instructions with barrier implications
(load-acquire/store-release) have a "memory" clobber
2. When performing exclusive accesses, the addresing mode is generated
using the "Q" constraint
3. Atomic blocks which use the condition flags, have a "cc" clobber
This patch addresses these concerns which, as well as fixing the
semantics of the code, stops GCC complaining about impossible asm
constraints.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'drivers/net/ieee802154')
0 files changed, 0 insertions, 0 deletions