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authorYury Norov <yury.norov@gmail.com>2020-02-03 17:37:24 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-02-04 03:05:26 +0000
commit0bddc1bd05d6973fee9303005abab6567f743ea7 (patch)
treed2eca8afb2d44bab2623694dc93481111a75ca25 /include/linux
parentlib/string: add strnchrnul() (diff)
downloadlinux-dev-0bddc1bd05d6973fee9303005abab6567f743ea7.tar.xz
linux-dev-0bddc1bd05d6973fee9303005abab6567f743ea7.zip
bitops: more BITS_TO_* macros
Introduce BITS_TO_U64, BITS_TO_U32 and BITS_TO_BYTES as they are handy in the following patches (BITS_TO_U32 specifically). Reimplement tools/ version of the macros according to the kernel implementation. Also fix indentation for BITS_PER_TYPE definition. Link: http://lkml.kernel.org/r/20200102043031.30357-3-yury.norov@gmail.com Signed-off-by: Yury Norov <yury.norov@gmail.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Amritha Nambiar <amritha.nambiar@intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Kees Cook <keescook@chromium.org> Cc: Matthew Wilcox <willy@infradead.org> Cc: Miklos Szeredi <mszeredi@redhat.com> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: "Tobin C . Harding" <tobin@kernel.org> Cc: Vineet Gupta <vineet.gupta1@synopsys.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Willem de Bruijn <willemb@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/bitops.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index 6c7c4133c25c..47f54b459c26 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -11,8 +11,10 @@
# define aligned_byte_mask(n) (~0xffUL << (BITS_PER_LONG - 8 - 8*(n)))
#endif
-#define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE)
+#define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE)
#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(long))
+#define BITS_TO_U64(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(u64))
+#define BITS_TO_U32(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(u32))
#define BITS_TO_BYTES(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(char))
extern unsigned int __sw_hweight8(unsigned int w);