The following commit has been merged into the x86/asm branch of tip: Commit-ID: 70e8a96f5408e409dc71b08a366d6d705e9d9fb8 Gitweb: https://git.kernel.org/tip/70e8a96f5408e409dc71b08a366d6d705e9d9fb8 Author: Uros Bizjak <ubizjak@xxxxxxxxx> AuthorDate: Mon, 03 Mar 2025 16:54:24 +01:00 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitterDate: Tue, 04 Mar 2025 10:53:51 +01:00 x86/irq/32: Use current_stack_pointer to avoid asm() in check_stack_overflow() Make code more readable by using the 'current_stack_pointer' global variable. Signed-off-by: Uros Bizjak <ubizjak@xxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Andy Lutomirski <luto@xxxxxxxxxx> Cc: Brian Gerst <brgerst@xxxxxxxxx> Cc: H. Peter Anvin <hpa@xxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20250303155446.112769-4-ubizjak@xxxxxxxxx --- arch/x86/kernel/irq_32.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c index f351fa1..2428d66 100644 --- a/arch/x86/kernel/irq_32.c +++ b/arch/x86/kernel/irq_32.c @@ -31,10 +31,7 @@ int sysctl_panic_on_stackoverflow __read_mostly; /* Debugging check for stack overflow: is there less than 1KB free? */ static int check_stack_overflow(void) { - long sp; - - __asm__ __volatile__("andl %%esp,%0" : - "=r" (sp) : "0" (THREAD_SIZE - 1)); + unsigned long sp = current_stack_pointer & (THREAD_SIZE - 1); return sp < (sizeof(struct thread_info) + STACK_WARN); }
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