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	Commit message (Collapse)	Author	Age	Files	Lines
*	arm64: atomics: Remove atomic_ll_sc compilation unit	Andrew Murray	2019-08-29	1	-3/+0
\| \| \| \| \| \| \| \| \| \|	We no longer fall back to out-of-line atomics on systems with CONFIG_ARM64_LSE_ATOMICS where ARM64_HAS_LSE_ATOMICS is not set. Remove the unused compilation unit which provided these symbols. Signed-off-by: Andrew Murray <andrew.murray@arm.com> Signed-off-by: Will Deacon <will@kernel.org>
*	arm64: introduce CONFIG_ARM64_LSE_ATOMICS as fallback to ll/sc atomics	Will Deacon	2015-07-27	1	-0/+3
	In order to patch in the new atomic instructions at runtime, we need to generate wrappers around the out-of-line exclusive load/store atomics. This patch adds a new Kconfig option, CONFIG_ARM64_LSE_ATOMICS. which causes our atomic functions to branch to the out-of-line ll/sc implementations. To avoid the register spill overhead of the PCS, the out-of-line functions are compiled with specific compiler flags to force out-of-line save/restore of any registers that are usually caller-saved. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>