kernel/arch/x86/boot/bitops.h, branch linux-rolling-stable

x86/asm: Remove code depending on __GCC_ASM_FLAG_OUTPUTS__

2025-09-08T13:38:06Z

The minimum supported GCC version is 8.1, which supports flag output operands and always defines __GCC_ASM_FLAG_OUTPUTS__ macro. Remove code depending on __GCC_ASM_FLAG_OUTPUTS__ and use the "=@ccCOND" flag output operand directly. Use the equivalent "=@ccz" instead of "=@cce" flag output operand for CMPXCHG8B and CMPXCHG16B instructions. These instructions set a single flag bit - the Zero flag - and "=@ccz" is used to distinguish the CC user from comparison instructions, where set ZERO flag indeed means that the values are equal. Signed-off-by: Uros Bizjak Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/r/20250905121723.GCaLrU04lP2A50PT-B@fat_crate.local

x86/boot: Remove superfluous type casting from arch/x86/boot/bitops.h

2022-08-15T17:17:43Z

'const void *' will auto-type-convert to just about any other const pointer type, no need to force it. [ mingo: Rewrote the changelog. ] Signed-off-by: Li kunyu Signed-off-by: Ingo Molnar Signed-off-by: Borislav Petkov Link: https://lore.kernel.org/r/20220725042358.3377-1-kunyu@nfschina.com

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497

2019-06-19T15:09:53Z

Based on 1 normalized pattern(s): this file is part of the linux kernel and is made available under the terms of the gnu general public license version 2 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 28 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Enrico Weigelt Reviewed-by: Allison Randal Reviewed-by: Kate Stewart Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.534229504@linutronix.de Signed-off-by: Greg Kroah-Hartman

x86/boot: Use CC_SET()/CC_OUT() instead of open coding it

2018-08-02T12:30:42Z

Remove open-coded uses of set instructions with CC_SET()/CC_OUT(). Signed-off-by: Uros Bizjak Signed-off-by: Thomas Gleixner Link: https://lkml.kernel.org/r/20180629142844.15200-1-ubizjak@gmail.com

x86, asm: use bool for bitops and other assembly outputs

2016-06-08T19:41:20Z

The gcc people have confirmed that using "bool" when combined with inline assembly always is treated as a byte-sized operand that can be assumed to be 0 or 1, which is exactly what the SET instruction emits. Change the output types and intermediate variables of as many operations as practical to "bool". Signed-off-by: H. Peter Anvin Link: http://lkml.kernel.org/r/1465414726-197858-3-git-send-email-hpa@linux.intel.com Reviewed-by: Andy Lutomirski Reviewed-by: Borislav Petkov Acked-by: Peter Zijlstra (Intel)

x86: remove pointless comments

2008-04-19T17:19:54Z

Remove old comments that include the old arch/i386 directory. Signed-off-by: WANG Cong Acked-by: H. Peter Anvin Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner

i386: move boot

2007-10-11T09:16:45Z

Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar