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a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=wKuvFiaSGQ0qltdbU6+NXLB8nM8=:19 a=Ol13hO9ccFRV9qXi2t6ftBPywas=:19 a=xqWC_Br6kY4A:10 a=6IFa9wvqVegA:10 a=GoEa3M9JfhUA:10 a=VwQbUJbxAAAA:8 a=7CQSdrXTAAAA:8 a=JfrnYn6hAAAA:8 a=yPCof4ZbAAAA:8 a=9Hjk7SY-VBZdzCxDJJEA:9 a=a-qgeE7W1pNrGK8U0ZQC:22 a=1CNFftbPRP8L7MoqJWF3:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNjI3MDAzNiBTYWx0ZWRfX6hROOojYJfq5 mnonTWe6tNuxp+9Z7AuKb06uxaFvXEVAKbkXdytU23FR/HuT2KbCqgZgrUThCnzdwxQxJ630z0n AldsGOAXXfNhC8GD5G6I9W+qk2ulpK2q3vdb7VWviPelXLQotcAAl+pMKgNS13oznj9hVvGtzHB BJ+GNAeo5t+q3KVFefHsxFGJwnP4UkJNgVmsU2lnql94yGXt81Tr9pkyFbIxwUrE9RBPtYTgVz+ hmjyjz32/vJ0ALnb3rAd6+p0msn8L0yo+FTLntsDh0+mBn8DWag3mdo6teaXi3q7/8ZBrDF9h6c KXXF1E4hgOSjv2jD5ap/RFP2uZkY8PDJbSt842HMdQz7LJTO43dkE7C69igTcptClrzhsXy0h4l 4fhAljg1VpNevL3ZhTuRVjALQ8VuiMcJW52rA5bodk8vW08F0DkFAefthMyXe1ppyLKo0gcQ X-Proofpoint-ORIG-GUID: ZkUl0FzhFpmh2uUjWN-uGLGMeN97DH6t Content-Type: text/plain; charset="utf-8" Add the acquire variant of smp_cond_load_relaxed_timewait(). This reuses the relaxed variant, with an additional LOAD->LOAD ordering via smp_acquire__after_ctrl_dep(). Also, the rqspinlock implementation has a locally cached copy of this interface. Fixup the parameters used there. Cc: Arnd Bergmann Cc: Will Deacon Cc: Catalin Marinas Cc: Peter Zijlstra Cc: linux-arch@vger.kernel.org Signed-off-by: Ankur Arora --- arch/arm64/include/asm/rqspinlock.h | 2 +- include/asm-generic/barrier.h | 22 ++++++++++++++++++++++ 2 files changed, 23 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/rqspinlock.h b/arch/arm64/include/asm/r= qspinlock.h index 9ea0a74e5892..f1b6a428013e 100644 --- a/arch/arm64/include/asm/rqspinlock.h +++ b/arch/arm64/include/asm/rqspinlock.h @@ -86,7 +86,7 @@ =20 #endif =20 -#define res_smp_cond_load_acquire(v, c) smp_cond_load_acquire_timewait(v, = c, 0, 1) +#define res_smp_cond_load_acquire(v, c) smp_cond_load_acquire_timewait(v, = c, 0ULL, 1ULL, 0) =20 #include =20 diff --git a/include/asm-generic/barrier.h b/include/asm-generic/barrier.h index 8299c57d1110..dd7c9ca2dff3 100644 --- a/include/asm-generic/barrier.h +++ b/include/asm-generic/barrier.h @@ -388,6 +388,28 @@ static inline u64 ___smp_cond_spinwait(u64 now, u64 pr= ev, u64 end, (typeof(*ptr))_val; \ }) =20 +/** + * smp_cond_load_acquire_timewait() - (Spin) wait for cond with ACQUIRE or= dering + * until a timeout expires. + * + * Arguments: same as smp_cond_load_relaxed_timeout(). + * + * Equivalent to using smp_cond_load_acquire() on the condition variable w= ith + * a timeout. + */ +#ifndef smp_cond_load_acquire_timewait +#define smp_cond_load_acquire_timewait(ptr, cond_expr, \ + time_expr, time_end, \ + slack) ({ \ + __unqual_scalar_typeof(*ptr) _val; \ + _val =3D smp_cond_load_relaxed_timewait(ptr, cond_expr, \ + time_expr, time_end, \ + slack); \ + /* Depends on the control dependency of the wait above. */ \ + smp_acquire__after_ctrl_dep(); \ + (typeof(*ptr))_val; \ +}) +#endif /* * pmem_wmb() ensures that all stores for which the modification * are written to persistent storage by preceding instructions have --=20 2.43.5