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| author | Thomas Gleixner <tglx@linutronix.de> | 2017-05-24 10:15:37 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-05-26 10:10:45 +0200 |
| commit | c23a465625e287c4deba0fdf5e8adc59cfd2a0b7 (patch) | |
| tree | 11235b5ba8e8e602f37676e4f9ea3187118293a6 /arch/arm64/include/asm/insn.h | |
| parent | kprobes: Cure hotplug lock ordering issues (diff) | |
| download | linux-c23a465625e287c4deba0fdf5e8adc59cfd2a0b7.tar.xz linux-c23a465625e287c4deba0fdf5e8adc59cfd2a0b7.zip | |
arm64: Prevent cpu hotplug rwsem recursion
The text patching functions which are invoked from jump_label and kprobes
code are protected against cpu hotplug at the call sites.
Use stop_machine_cpuslocked() to avoid recursion on the cpu hotplug
rwsem. stop_machine_cpuslocked() contains a lockdep assertion to catch any
unprotected callers.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20170524081549.197070135@linutronix.de
Diffstat (limited to 'arch/arm64/include/asm/insn.h')
| -rw-r--r-- | arch/arm64/include/asm/insn.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/insn.h b/arch/arm64/include/asm/insn.h index 29cb2ca756f6..4214c38d016b 100644 --- a/arch/arm64/include/asm/insn.h +++ b/arch/arm64/include/asm/insn.h @@ -433,7 +433,6 @@ u32 aarch64_set_branch_offset(u32 insn, s32 offset); bool aarch64_insn_hotpatch_safe(u32 old_insn, u32 new_insn); int aarch64_insn_patch_text_nosync(void *addr, u32 insn); -int aarch64_insn_patch_text_sync(void *addrs[], u32 insns[], int cnt); int aarch64_insn_patch_text(void *addrs[], u32 insns[], int cnt); s32 aarch64_insn_adrp_get_offset(u32 insn); |