]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
mm/vmscan.c: fix unsequenced modification and access warning
authorNick Desaulniers <nick.desaulniers@gmail.com>
Thu, 6 Jul 2017 22:36:50 +0000 (15:36 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 6 Jul 2017 23:24:31 +0000 (16:24 -0700)
commitf2f43e566a02a3bdde0a65e6a2e88d707c212a29
tree7607b53a29c2cfaf45860ac033cb96903ea93c9a
parentac34ceaf1cdb34e8c34c0873ee562e9df6087cbc
mm/vmscan.c: fix unsequenced modification and access warning

Clang and its -Wunsequenced emits a warning

  mm/vmscan.c:2961:25: error: unsequenced modification and access to 'gfp_mask' [-Wunsequenced]
                  .gfp_mask = (gfp_mask = current_gfp_context(gfp_mask)),
                                        ^

While it is not clear to me whether the initialization code violates the
specification (6.7.8 par 19 (ISO/IEC 9899) looks like it disagrees) the
code is quite confusing and worth cleaning up anyway.  Fix this by
reusing sc.gfp_mask rather than the updated input gfp_mask parameter.

Link: http://lkml.kernel.org/r/20170510154030.10720-1-nick.desaulniers@gmail.com
Signed-off-by: Nick Desaulniers <nick.desaulniers@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/vmscan.c