openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

arm64: fpsimd: Consistently use __this_cpu_ ops where appropriate 

__this_cpu_ ops are not used consistently with regard to this_cpu_
ops in a couple of places in fpsimd.c.

Since preemption is explicitly disabled in
fpsimd_restore_current_state() and fpsimd_update_current_state(),
this patch converts this_cpu_ ops in those functions to __this_cpu_
ops.  This doesn't save cost on arm64, but benefits from additional
assertions in the core code.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Dave Martin 2017-08-03 17:23:21 +01:00 committed by Catalin Marinas
parent 0fc9179ad0
commit 504641859e
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm64/kernel/fpsimd.c
View File

@ -194,7 +194,7 @@ void fpsimd_restore_current_state(void)
struct fpsimd_state *st = &current->thread.fpsimd_state; struct fpsimd_state *st = &current->thread.fpsimd_state;
fpsimd_load_state(st); fpsimd_load_state(st);
this_cpu_write(fpsimd_last_state, st); __this_cpu_write(fpsimd_last_state, st);
st->cpu = smp_processor_id(); st->cpu = smp_processor_id();
} }
preempt_enable(); preempt_enable();
@ -214,7 +214,7 @@ void fpsimd_update_current_state(struct fpsimd_state *state)
if (test_and_clear_thread_flag(TIF_FOREIGN_FPSTATE)) { if (test_and_clear_thread_flag(TIF_FOREIGN_FPSTATE)) {
struct fpsimd_state *st = &current->thread.fpsimd_state; struct fpsimd_state *st = &current->thread.fpsimd_state;
this_cpu_write(fpsimd_last_state, st); __this_cpu_write(fpsimd_last_state, st);
st->cpu = smp_processor_id(); st->cpu = smp_processor_id();
} }
preempt_enable(); preempt_enable();