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x86/ftrace: Rebalance RSB
authorPeter Zijlstra <peterz@infradead.org>
Thu, 15 Sep 2022 11:11:36 +0000 (13:11 +0200)
committerPeter Zijlstra <peterz@infradead.org>
Mon, 17 Oct 2022 14:41:19 +0000 (16:41 +0200)
commit36b64f101219dd9e6e4f0ea880b64e8a90da547b
treee3ffe8cca7a7d2946a904fa0b5f87576a1ffcd0atree
parenteac828eaef295cd0cc8b58f55fa5c8401fdc2370commit | diff
x86/ftrace: Rebalance RSB

ftrace_regs_caller() uses a PUSH;RET pattern to tail-call into a
direct-call function, this unbalances the RSB, fix that.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220915111148.823216933@infradead.org
arch/x86/kernel/ftrace_64.S diff | blob | history
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