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kernel/compat.c: mark expected switch fall-throughs 

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

This patch aims to suppress 3 missing-break-in-switch false positives
on some architectures.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: Gustavo A. R. Silva <gustavo@embeddedor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Jann Horn <jannh@google.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Stephen Rothwell 2019-05-15 15:23:52 +10:00 committed by Linus Torvalds
parent 5ac9433224
commit 89963adcdb
1 changed files with 3 additions and 0 deletions
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3
kernel/compat.c
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@ -346,8 +346,11 @@ get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat)
return -EFAULT;
switch (_NSIG_WORDS) {
case 4: set->sig[3] = v.sig[6] | (((long)v.sig[7]) << 32 );
/* fall through */
case 3: set->sig[2] = v.sig[4] | (((long)v.sig[5]) << 32 );
/* fall through */
case 2: set->sig[1] = v.sig[2] | (((long)v.sig[3]) << 32 );
/* fall through */
case 1: set->sig[0] = v.sig[0] | (((long)v.sig[1]) << 32 );
}
#else