+ cpumask-dont-calculate-length-of-the-input-string.patch added to -mm tree

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



The patch titled
     Subject: cpumask: don't calculate length of the input string
has been added to the -mm tree.  Its filename is
     cpumask-dont-calculate-length-of-the-input-string.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/cpumask-dont-calculate-length-of-the-input-string.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/cpumask-dont-calculate-length-of-the-input-string.patch

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next and is updated
there every 3-4 working days

------------------------------------------------------
From: Yury Norov <ynorov@xxxxxxxxxxx>
Subject: cpumask: 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/20190501010636.30595-8-ynorov@xxxxxxxxxxx
Signed-off-by: Yury Norov <ynorov@xxxxxxxxxxx>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Cc: Amritha Nambiar <amritha.nambiar@xxxxxxxxx>
Cc: Willem de Bruijn <willemb@xxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: "Tobin C . Harding" <tobin@xxxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: Steffen Klassert <steffen.klassert@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 include/linux/cpumask.h |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

--- a/include/linux/cpumask.h~cpumask-dont-calculate-length-of-the-input-string
+++ a/include/linux/cpumask.h
@@ -633,9 +633,7 @@ static inline int cpumask_parselist_user
  */
 static inline int cpumask_parse(const char *buf, struct cpumask *dstp)
 {
-	unsigned int len = strchrnul(buf, '\n') - buf;
-
-	return bitmap_parse(buf, len, cpumask_bits(dstp), nr_cpumask_bits);
+	return bitmap_parse(buf, UINT_MAX, cpumask_bits(dstp), nr_cpumask_bits);
 }
 
 /**
_

Patches currently in -mm which might be from ynorov@xxxxxxxxxxx are

lib-string-add-strnchrnul.patch
bitops-more-bits_to_-macros.patch
lib-add-test-for-bitmap_parse.patch
lib-make-bitmap_parse_user-a-wrapper-on-bitmap_parse.patch
lib-rework-bitmap_parse.patch
lib-new-testcases-for-bitmap_parse_user.patch
cpumask-dont-calculate-length-of-the-input-string.patch




[Index of Archives]     [Kernel Archive]     [IETF Annouce]     [DCCP]     [Netdev]     [Networking]     [Security]     [Bugtraq]     [Yosemite]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux SCSI]

  Powered by Linux