Adding upstream version 5.10.216.upstream/5.10.216

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 4 insertions, 11 deletions

diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index d7e017b0b..6dc3c5f0b 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -441,6 +441,9 @@ struct fixed_percpu_data {
 	 * GCC hardcodes the stack canary as %gs:40.  Since the
 	 * irq_stack is the object at %gs:0, we reserve the bottom
 	 * 48 bytes of the irq stack for the canary.
+	 *
+	 * Once we are willing to require -mstack-protector-guard-symbol=
+	 * support for x86_64 stackprotector, we can get rid of this.
 	 */
 	char		gs_base[40];
 	unsigned long	stack_canary;
@@ -461,17 +464,7 @@ extern asmlinkage void ignore_sysret(void);
 void current_save_fsgs(void);
 #else	/* X86_64 */
 #ifdef CONFIG_STACKPROTECTOR
-/*
- * Make sure stack canary segment base is cached-aligned:
- *   "For Intel Atom processors, avoid non zero segment base address
- *    that is not aligned to cache line boundary at all cost."
- * (Optim Ref Manual Assembly/Compiler Coding Rule 15.)
- */
-struct stack_canary {
-	char __pad[20];		/* canary at %gs:20 */
-	unsigned long canary;
-};
-DECLARE_PER_CPU_ALIGNED(struct stack_canary, stack_canary);
+DECLARE_PER_CPU(unsigned long, __stack_chk_guard);
 #endif
 /* Per CPU softirq stack pointer */
 DECLARE_PER_CPU(struct irq_stack *, softirq_stack_ptr);