jump_label: Rename JUMP_LABEL_{EN,DIS}ABLE to JUMP_LABEL_{JMP,NOP}
authorPeter Zijlstra <peterz@infradead.org>
Fri, 24 Jul 2015 12:45:44 +0000 (14:45 +0200)
committerIngo Molnar <mingo@kernel.org>
Mon, 3 Aug 2015 09:34:12 +0000 (11:34 +0200)
commit76b235c6bcb16062d663e2ee96db0b69f2e6bc14
tree60355848b836cd6b52228bedfbabc1631c4c905e
parentf320ead76a87a9c533f681ecce3bf3241d07c47d
jump_label: Rename JUMP_LABEL_{EN,DIS}ABLE to JUMP_LABEL_{JMP,NOP}

Since we've already stepped away from ENABLE is a JMP and DISABLE is a
NOP with the branch_default bits, and are going to make it even worse,
rename it to make it all clearer.

This way we don't mix multiple levels of logic attributes, but have a
plain 'physical' name for what the current instruction patching status
of a jump label is.

This is a first step in removing the naming confusion that has led to
a stream of avoidable bugs such as:

  a833581e372a ("x86, perf: Fix static_key bug in load_mm_cr4()")

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
[ Beefed up the changelog. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/arm/kernel/jump_label.c
arch/arm64/kernel/jump_label.c
arch/mips/kernel/jump_label.c
arch/powerpc/kernel/jump_label.c
arch/s390/kernel/jump_label.c
arch/sparc/kernel/jump_label.c
arch/x86/kernel/jump_label.c
include/linux/jump_label.h
kernel/jump_label.c