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x86/bootflag: Micro-optimize sbf_write()
authorUros Bizjak <ubizjak@gmail.com>
Wed, 26 Feb 2025 15:36:56 +0000 (16:36 +0100)
committerIngo Molnar <mingo@kernel.org>
Thu, 27 Feb 2025 09:14:00 +0000 (10:14 +0100)
commitadf6819278ba34be1d29ffcdca5c2ccd2123f667
tree1dd4cea5b792257ae75fb63ff576ee1ed2318a4ctree
parent7d8f03f7dd9f7d108b8d5af12fdc57e10555981fcommit | diff
x86/bootflag: Micro-optimize sbf_write()

Change parity bit with XOR when !parity instead of masking bit out
and conditionally setting it when !parity.

Saves a couple of bytes in the object file.

Co-developed-by: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20250226153709.6370-1-ubizjak@gmail.com
arch/x86/kernel/bootflag.c diff | blob | history
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