Commit 190535f7 authored by Yury Norov's avatar Yury Norov Committed by Linus Torvalds

include/linux/cpumask.h: don't calculate length of the input string

New design of inner bitmap_parse() allows to avoid calculating the size of
a null-terminated string.

Link: http://lkml.kernel.org/r/20200102043031.30357-8-yury.norov@gmail.comSigned-off-by: default avatarYury Norov <yury.norov@gmail.com>
Reviewed-by: default avatarAndy 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 809e308f
...@@ -663,9 +663,7 @@ static inline int cpumask_parselist_user(const char __user *buf, int len, ...@@ -663,9 +663,7 @@ static inline int cpumask_parselist_user(const char __user *buf, int len,
*/ */
static inline int cpumask_parse(const char *buf, struct cpumask *dstp) static inline int cpumask_parse(const char *buf, struct cpumask *dstp)
{ {
unsigned int len = strchrnul(buf, '\n') - buf; return bitmap_parse(buf, UINT_MAX, cpumask_bits(dstp), nr_cpumask_bits);
return bitmap_parse(buf, len, cpumask_bits(dstp), nr_cpumask_bits);
} }
/** /**
......
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