[PATCH v3 2/6] x86/alternatives: Update int3_emulate_push() comment
From: Peter Zijlstra
Date: Mon Oct 07 2019 - 07:25:34 EST
Update the comment now that we've merged x86_32 support.
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
---
arch/x86/include/asm/text-patching.h | 3 +++
1 file changed, 3 insertions(+)
--- a/arch/x86/include/asm/text-patching.h
+++ b/arch/x86/include/asm/text-patching.h
@@ -85,6 +85,9 @@ static inline void int3_emulate_push(str
* stack where the break point happened, and the saving of
* pt_regs. We can extend the original stack because of
* this gap. See the idtentry macro's create_gap option.
+ *
+ * Similarly entry_32.S will have a gap on the stack for (any) hardware
+ * exception and pt_regs; see FIXUP_FRAME.
*/
regs->sp -= sizeof(unsigned long);
*(unsigned long *)regs->sp = val;