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authorPeter Zijlstra2019-03-19 11:35:46 +0100
committerIngo Molnar2019-04-03 11:02:24 +0200
commit64604d54d3115fee89598bfb6d8d2252f8a2d114 (patch)
tree8f2dd9b37fb0011a9814d57150307872db6f294e /arch/x86/entry
parent2f0f9e9ad7b3459c5c54ef2c03145a98e65dd158 (diff)
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')
-rw-r--r--arch/x86/entry/entry_64.S2
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