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authorLinus Torvalds <torvalds@linux-foundation.org>2016-07-27 20:03:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-07-27 20:03:31 -0700
commit194dc870a5890e855ecffb30f3b80ba7c88f96d6 (patch)
tree776c4bf61bac8d6fe722926317ba9d757c6e054a /lib
parent124a3d88fa20e1869fc229d7d8c740cc81944264 (diff)
Add braces to avoid "ambiguous ‘else’" compiler warnings
Some of our "for_each_xyz()" macro constructs make gcc unhappy about lack of braces around if-statements inside or outside the loop, because the loop construct itself has a "if-then-else" statement inside of it. The resulting warnings look something like this: drivers/gpu/drm/i915/i915_debugfs.c: In function ‘i915_dump_lrc’: drivers/gpu/drm/i915/i915_debugfs.c:2103:6: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (ctx != dev_priv->kernel_context) ^ even if the code itself is fine. Since the warning is fairly easy to avoid by adding a braces around the if-statement near the for_each_xyz() construct, do so, rather than disabling the otherwise potentially useful warning. (The if-then-else statements used in the "for_each_xyz()" constructs are designed to be inherently safe even with no braces, but in this case it's quite understandable that gcc isn't really able to tell that). This finally leaves the standard "allmodconfig" build with just a handful of remaining warnings, so new and valid warnings hopefully will stand out. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
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