-Wsometimes-uninitialized in mm/zswap.c

[nathanchance]

mm/zswap.c:1183:6: error: variable 'ret' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized]
 1183 |         if (objcg && !obj_cgroup_may_zswap(objcg))
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mm/zswap.c:1327:9: note: uninitialized use occurs here
 1327 |         return ret;
      |                ^~~
mm/zswap.c:1183:2: note: remove the 'if' if its condition is always false
 1183 |         if (objcg && !obj_cgroup_may_zswap(objcg))
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 1184 |                 goto reject;
      | ~~~~~~~~~~~~~~~~~~~~~~~~~~~
mm/zswap.c:1158:9: note: initialize the variable 'ret' to silence this warning
 1158 |         int ret;
      |                ^
      |                 = 0
1 error generated.

Patch submitted: https://lore.kernel.org/20230601-zswap-cgroup-wsometimes-uninitialized-v1-1-35debdd19293@kernel.org/

[nathanchance]

Fixed:

https://git.kernel.org/next/linux-next/c/0c4adccd42ad09110de2475d3fb3b9ea688e7882
https://git.kernel.org/next/linux-next/c/287848db176ee7f05e9c0d2d69c67cd2877d1034