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include/linux/compat.h: mark expected switch fall-throughs 

In preparation to enabling -Wimplicit-fallthrough, mark switch cases where
we are expecting to fall through.

Link: http://lkml.kernel.org/r/20181013115048.GA3262@embeddedor.com
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Gustavo A. R. Silva 2018-10-30 15:05:49 -07:00 committed by Linus Torvalds
parent 048e513d87
commit 8997600553
1 changed files with 3 additions and 0 deletions
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3
include/linux/compat.h
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@ -488,8 +488,11 @@ put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
compat_sigset_t v;
switch (_NSIG_WORDS) {
case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
/* fall through */
case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
/* fall through */
case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
/* fall through */
case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
}
return copy_to_user(compat, &v, size) ? -EFAULT : 0;