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| author | Thomas Gleixner <tglx@linutronix.de> | 2022-09-15 14:11:04 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-10-17 17:41:05 +0300 |
| commit | c063a217bc0726c2560138229de5673dbb253a02 (patch) | |
| tree | 2cd279066be02c20600ed0aa0d9a1e7e496ecb33 /arch/x86/entry/entry_32.S | |
| parent | 7443b296e699e6922f5be243c8d2e316de8cacbe (diff) | |
| download | linux-c063a217bc0726c2560138229de5673dbb253a02.tar.xz | |
x86/percpu: Move current_top_of_stack next to current_task
Extend the struct pcpu_hot cacheline with current_top_of_stack;
another very frequently used value.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220915111145.493038635@infradead.org
Diffstat (limited to 'arch/x86/entry/entry_32.S')
| -rw-r--r-- | arch/x86/entry/entry_32.S | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S index e309e7156038..91397f58ac30 100644 --- a/arch/x86/entry/entry_32.S +++ b/arch/x86/entry/entry_32.S @@ -1181,7 +1181,7 @@ SYM_CODE_START(asm_exc_nmi) * is using the thread stack right now, so it's safe for us to use it. */ movl %esp, %ebx - movl PER_CPU_VAR(cpu_current_top_of_stack), %esp + movl PER_CPU_VAR(pcpu_hot + X86_top_of_stack), %esp call exc_nmi movl %ebx, %esp @@ -1243,7 +1243,7 @@ SYM_CODE_START(rewind_stack_and_make_dead) /* Prevent any naive code from trying to unwind to our caller. */ xorl %ebp, %ebp - movl PER_CPU_VAR(cpu_current_top_of_stack), %esi + movl PER_CPU_VAR(pcpu_hot + X86_top_of_stack), %esi leal -TOP_OF_KERNEL_STACK_PADDING-PTREGS_SIZE(%esi), %esp call make_task_dead |