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authorMasami Hiramatsu <mhiramat@kernel.org>2017-09-19 19:02:20 +0900
committerIngo Molnar <mingo@kernel.org>2017-09-28 09:25:50 +0200
commita19b2e3d783964d48d2b494439648e929bcdc976 (patch)
treee9937278cf4c1555e28853edbfdb0c6de25ff68d /arch/x86/pci/fixup.c
parent5bb4fc2d8641219732eb2bb654206775a4219aca (diff)
kprobes/x86: Remove IRQ disabling from ftrace-based/optimized kprobes
Kkprobes don't need to disable IRQs if they are called from the ftrace/jump trampoline code, because Documentation/kprobes.txt says: ----- Probe handlers are run with preemption disabled. Depending on the architecture and optimization state, handlers may also run with interrupts disabled (e.g., kretprobe handlers and optimized kprobe handlers run without interrupt disabled on x86/x86-64). ----- So let's remove IRQ disabling from those handlers. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Alexei Starovoitov <ast@fb.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E . McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/150581534039.32348.11331736206004264553.stgit@devbox Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/pci/fixup.c')
0 files changed, 0 insertions, 0 deletions