Mark Rutland 9d84fb27fa arm64: restore get_current() optimisation ... Commit c02433dd6d ("arm64: split thread_info from task stack") inverted the relationship between get_current() and current_thread_info(), with sp_el0 now holding the current task_struct rather than the current thead_info. The new implementation of get_current() prevents the compiler from being able to optimize repeated calls to either, resulting in a noticeable penalty in some microbenchmarks. This patch restores the previous optimisation by implementing get_current() in the same way as our old current_thread_info(), using a non-volatile asm statement. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Mark Rutland <mark.rutland@arm.com> Reported-by: Davidlohr Bueso <dbueso@suse.de> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2017-01-04 16:26:18 +00:00
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asm	arm64: restore get_current() optimisation	2017-01-04 16:26:18 +00:00
uapi/asm	arm64 fixes:	2016-08-06 08:58:59 -04:00