]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
bitops.h: improve sign_extend32()'s documentation
authorMartin Kepplinger <martink@posteo.de>
Sat, 7 Nov 2015 00:30:58 +0000 (16:30 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sat, 7 Nov 2015 01:50:42 +0000 (17:50 -0800)
commite2eb53aa96754b97d158eff884dde88abbad925e
tree0159c242d120da9cd02dc3d59a8b7787da811fb8
parentcd2c3e7f94f3d8210320bfb9b5712bdcbb12f8db
bitops.h: improve sign_extend32()'s documentation

It is often overlooked that sign_extend32(), despite its name, is safe to
use for 16 and 8 bit types as well.  This should help prevent sign
extension being done manually some other way.

Signed-off-by: Martin Kepplinger <martin.kepplinger@theobroma-systems.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: George Spelvin <linux@horizon.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Maxime Coquelin <maxime.coquelin@st.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/bitops.h