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authorMasahiro Yamada <yamada.masahiro@socionext.com>2017-09-08 16:13:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-08 18:26:47 -0700
commit604df322363e5770735df85368f83cac4a955a24 (patch)
tree03222c6761b0edd74a2675f21f1542b0b03e9cf1 /include/linux/kernel.h
parentfs, proc: unconditional cond_resched when reading smaps (diff)
downloadwireguard-linux-604df322363e5770735df85368f83cac4a955a24.tar.xz
wireguard-linux-604df322363e5770735df85368f83cac4a955a24.zip
linux/kernel.h: move DIV_ROUND_DOWN_ULL() macro
This macro is useful to avoid link error on 32-bit systems. We have the same definition in two drivers, so move it to include/linux/kernel.h While we are here, refactor DIV_ROUND_UP_ULL() by using DIV_ROUND_DOWN_ULL(). Link: http://lkml.kernel.org/r/1500945156-12907-1-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Mark Brown <broonie@kernel.org> Cc: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr> Cc: Jaroslav Kysela <perex@perex.cz> Cc: Takashi Iwai <tiwai@suse.com> Cc: Liam Girdwood <lgirdwood@gmail.com> Cc: Boris Brezillon <boris.brezillon@free-electrons.com> Cc: Marek Vasut <marek.vasut@gmail.com> Cc: Brian Norris <computersforpeace@gmail.com> Cc: Richard Weinberger <richard@nod.at> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/kernel.h')
-rw-r--r--include/linux/kernel.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 6607225d0ea4..0ad4c3044cf9 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -78,8 +78,11 @@
#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
#define DIV_ROUND_UP __KERNEL_DIV_ROUND_UP
-#define DIV_ROUND_UP_ULL(ll,d) \
- ({ unsigned long long _tmp = (ll)+(d)-1; do_div(_tmp, d); _tmp; })
+
+#define DIV_ROUND_DOWN_ULL(ll, d) \
+ ({ unsigned long long _tmp = (ll); do_div(_tmp, d); _tmp; })
+
+#define DIV_ROUND_UP_ULL(ll, d) DIV_ROUND_DOWN_ULL((ll) + (d) - 1, (d))
#if BITS_PER_LONG == 32
# define DIV_ROUND_UP_SECTOR_T(ll,d) DIV_ROUND_UP_ULL(ll, d)