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Peter Anvin" Subject: [PATCH -tip 4/5] x86/irq/32: Use current_stack_pointer to avoid asm() in check_stack_overflow() Date: Mon, 3 Mar 2025 16:54:24 +0100 Message-ID: <20250303155446.112769-4-ubizjak@gmail.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20250303155446.112769-1-ubizjak@gmail.com> References: <20250303155446.112769-1-ubizjak@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Make code more readable by using current_stack_pointer global variable. Signed-off-by: Uros Bizjak Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: "H. Peter Anvin" --- 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 f351fa1ee6a7..2428d661faaf 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); } -- 2.42.0