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Subject[PATCH 0/5 v2] [GIT PULL] x86/jump label: Paranoid checks and 2 or 5 byte nops


This is the second round with the suggestions made by Peter and Andrew
incorporated (and tested).

We can still let this code sit on LKML for a little bit, to give time
for anyone else that wants to complain about them ;-)

Changes for v2:
Used GENERIC_NOP5_ATOMIC instead of open coding the nop.
(suggested by H. Peter Anvin)

I also added a comment to the code that explains that the
JUMP_LABEL_INIT_NOP must match the update_jump_label.c code.

Used const pointers for default_nop and short_nop.
(suggested by Andrew Morton)

Please pull (again, if everyone is OK with them) the latest
tip/perf/jump-label-2 tree, which can be found at:


Head SHA1: 78498e6a36ca3d192ee6a151d8c081525e6c9abe

Steven Rostedt (5):
x86/jump-label: Use best default nops for inital jump label calls
x86/jump-label: Do not bother updating nops if they are correct
x86/jump-label: Add safety checks to jump label conversions
jump labels: Add infrastructure to update jump labels at compile time
x86/jump labels: Use etiher 5 byte or 2 byte jumps

Makefile | 7 +
arch/Kconfig | 6 +
arch/x86/Kconfig | 1 +
arch/x86/include/asm/jump_label.h | 14 ++-
arch/x86/kernel/jump_label.c | 109 +++++++++++-
scripts/Makefile | 1 +
scripts/ | 15 ++-
scripts/update_jump_label.c | 341 +++++++++++++++++++++++++++++++++++++
scripts/update_jump_label.h | 208 ++++++++++++++++++++++
9 files changed, 688 insertions(+), 14 deletions(-)
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