Mark Rutland 8cf2093f53 arm64: percpu: Fix LSE operations on {8,16}-bit types ... The assembly for __percpu_##name##_case_##sz() and __percpu_##name##_return_case_##sz() doesn't use the 'sfx' macro argument to form the LSE instruction. Without 'sfx', a W register argument will imply a 32-bit memory location, and consequently {8,16}-bit ops will erroneously read and write 32 bits of memory when the LSE instruction is used. Fix this by appending 'sfx' to 'op_lse' to LSE instruction. It is not necessary (and not valid) to append 'sfx' to 'op_llsc', as 'op_llsc' is a register-register operation which does not access memory (and does not take a size suffix). Fixes: 959bf2fd03 ("arm64: percpu: Rewrite per-cpu ops to allow use of LSE atomics") Signed-off-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Jinjie Ruan <ruanjinjie@huawei.com> Cc: Ada Couprie Diaz <ada.coupriediaz@arm.com> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: James Morse <james.morse@arm.com> Cc: Marc Zyngier <maz@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Vladimir Murzin <vladimir.murzin@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Yang Shi <yang@os.amperecomputing.com> Cc: stable@vger.kernel.org Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com> Signed-off-by: Will Deacon <will@kernel.org>		2026-09-11 12:32:22 +00:00
..
asm	arm64: percpu: Fix LSE operations on {8,16}-bit types	2026-09-11 12:32:22 +00:00
uapi/asm	Arm:	2026-08-25 11:48:04 -07:00