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| author | Thomas Gleixner <tglx@linutronix.de> | 2022-09-15 13:11:04 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-10-17 16:41:05 +0200 |
| commit | c063a217bc0726c2560138229de5673dbb253a02 (patch) | |
| tree | 2cd279066be02c20600ed0aa0d9a1e7e496ecb33 /arch/x86/include | |
| parent | 7443b296e699e6922f5be243c8d2e316de8cacbe (diff) | |
| download | linux-stable-c063a217bc0726c2560138229de5673dbb253a02.tar.gz linux-stable-c063a217bc0726c2560138229de5673dbb253a02.tar.bz2 linux-stable-c063a217bc0726c2560138229de5673dbb253a02.zip | |
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/include')
| -rw-r--r-- | arch/x86/include/asm/current.h | 1 | ||||
| -rw-r--r-- | arch/x86/include/asm/processor.h | 4 |
2 files changed, 2 insertions, 3 deletions
diff --git a/arch/x86/include/asm/current.h b/arch/x86/include/asm/current.h index 8ac6589e9a1b..2dd013128f1e 100644 --- a/arch/x86/include/asm/current.h +++ b/arch/x86/include/asm/current.h @@ -17,6 +17,7 @@ struct pcpu_hot { struct task_struct *current_task; int preempt_count; int cpu_number; + unsigned long top_of_stack; }; u8 pad[64]; }; diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index c660700ecfc6..c345f3096c80 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -426,8 +426,6 @@ struct irq_stack { char stack[IRQ_STACK_SIZE]; } __aligned(IRQ_STACK_SIZE); -DECLARE_PER_CPU(unsigned long, cpu_current_top_of_stack); - #ifdef CONFIG_X86_64 struct fixed_percpu_data { /* @@ -566,7 +564,7 @@ static __always_inline unsigned long current_top_of_stack(void) * and around vm86 mode and sp0 on x86_64 is special because of the * entry trampoline. */ - return this_cpu_read_stable(cpu_current_top_of_stack); + return this_cpu_read_stable(pcpu_hot.top_of_stack); } static __always_inline bool on_thread_stack(void) |