The following commit has been merged into the x86/entry branch of tip: Commit-ID: 467a8425d10508886eb5bcc0b80e0c73da4751c4 Gitweb: https://git.kernel.org/tip/467a8425d10508886eb5bcc0b80e0c73da4751c4 Author: Thomas Gleixner <[email protected]> AuthorDate: Thu, 30 Apr 2020 11:07:20 +02:00 Committer: Thomas Gleixner <[email protected]> CommitterDate: Tue, 19 May 2020 16:04:13 +02:00
x86/traps: Address objtool noinstr complaints in #DB The functions invoked from handle_debug() can be instrumented. Tell objtool about it. Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Alexandre Chartre <[email protected]> Acked-by: Peter Zijlstra <[email protected]> Acked-by: Andy Lutomirski <[email protected]> Link: https://lkml.kernel.org/r/[email protected] --- arch/x86/kernel/traps.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index b62e962..41bb0cb 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -784,14 +784,19 @@ static void noinstr handle_debug(struct pt_regs *regs, unsigned long dr6, /* Store the virtualized DR6 value */ tsk->thread.debugreg6 = dr6; + instrumentation_begin(); #ifdef CONFIG_KPROBES - if (kprobe_debug_handler(regs)) + if (kprobe_debug_handler(regs)) { + instrumentation_end(); return; + } #endif if (notify_die(DIE_DEBUG, "debug", regs, (long)&dr6, 0, - SIGTRAP) == NOTIFY_STOP) + SIGTRAP) == NOTIFY_STOP) { + instrumentation_end(); return; + } /* * Let others (NMI) know that the debug stack is in use @@ -827,6 +832,7 @@ static void noinstr handle_debug(struct pt_regs *regs, unsigned long dr6, out: cond_local_irq_disable(regs); debug_stack_usage_dec(); + instrumentation_end(); } static __always_inline void exc_debug_kernel(struct pt_regs *regs,
