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| author |   Peter Zijlstra <peterz@infradead.org> | 2019-03-19 11:35:46 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2019-04-03 11:02:24 +0200 |
| commit | 64604d54d3115fee89598bfb6d8d2252f8a2d114 (patch) | |
| tree | 8f2dd9b37fb0011a9814d57150307872db6f294e /arch/x86/entry/entry_64.S | |
| parent | objtool: Add Direction Flag validation (diff) | |
| download | linux-dev-64604d54d3115fee89598bfb6d8d2252f8a2d114.tar.xz linux-dev-64604d54d3115fee89598bfb6d8d2252f8a2d114.zip | |
sched/x86_64: Don't save flags on context switch
Now that we have objtool validating AC=1 state for all x86_64 code,
we can once again guarantee clean flags on schedule.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/entry/entry_64.S')
| -rw-r--r-- | arch/x86/entry/entry_64.S | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index 4fe27b67d7e2..1f0efdb7b629 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -291,7 +291,6 @@ ENTRY(__switch_to_asm) pushq %r13 pushq %r14 pushq %r15 - pushfq /* switch stack */ movq %rsp, TASK_threadsp(%rdi) @@ -314,7 +313,6 @@ ENTRY(__switch_to_asm) #endif /* restore callee-saved registers */ - popfq popq %r15 popq %r14 popq %r13 |