linux.git/arch/parisc/kernel/jump_label.c, branch v6.2 Linux kernel source tree jump_label: make initial NOP patching the special case 2022-06-24T07:48:55+00:00 Ard Biesheuvel ardb@kernel.org 2022-06-15T15:41:42+00:00 7e6b9db27de9f69a705c1a046d45882c768e16c3 Instead of defaulting to patching NOP opcodes at init time, and leaving it to the architectures to override this if this is not needed, switch to a model where doing nothing is the default. This is the common case by far, as only MIPS requires NOP patching at init time. On all other architectures, the correct encodings are emitted by the compiler and so no initial patching is needed. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20220615154142.1574619-4-ardb@kernel.org 
Instead of defaulting to patching NOP opcodes at init time, and leaving
it to the architectures to override this if this is not needed, switch
to a model where doing nothing is the default. This is the common case
by far, as only MIPS requires NOP patching at init time. On all other
architectures, the correct encodings are emitted by the compiler and so
no initial patching is needed.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220615154142.1574619-4-ardb@kernel.org
parisc: Add static branch and JUMP_LABEL feature 2019-05-05T22:10:03+00:00 Helge Deller deller@gmx.de 2019-05-03T21:51:00+00:00 62217beb394e654bbd2bb87c533dadd2d8bf62c6 Signed-off-by: Helge Deller <deller@gmx.de> 
Signed-off-by: Helge Deller <deller@gmx.de>