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authorLukas Wunner <lukas@wunner.de>2017-10-12 12:40:10 +0200
committerLinus Walleij <linus.walleij@linaro.org>2017-10-19 22:32:38 +0200
commit5307e2ad69ab3b0e0622fdf8b254c1d4565eb924 (patch)
tree8e4283ec0a9ef7ac7eaf5a22c3ecbb10ab496dc4 /drivers/input/joystick
parent07901a94f9f9b11cc3a4537e33229cb7e7df5d2a (diff)
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bitops: Introduce assign_bit()
A common idiom is to assign a value to a bit with: if (value) set_bit(nr, addr); else clear_bit(nr, addr); Likewise common is the one-line expression variant: value ? set_bit(nr, addr) : clear_bit(nr, addr); Commit 9a8ac3ae682e ("dm mpath: cleanup QUEUE_IF_NO_PATH bit manipulation by introducing assign_bit()") introduced assign_bit() to the md subsystem for brevity. Make it available to others, specifically gpiolib and the upcoming driver for Maxim MAX3191x industrial serializer chips. As requested by Peter Zijlstra, change the argument order to reflect traditional "dst = src" in C, hence "assign_bit(nr, addr, value)". Cc: Bart Van Assche <bart.vanassche@wdc.com> Cc: Alasdair Kergon <agk@redhat.com> Cc: Mike Snitzer <snitzer@redhat.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Neil Brown <neilb@suse.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Acked-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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