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jhash: fix -Wimplicit-fallthrough warnings

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GCC 7 added a new -Wimplicit-fallthrough warning.  It's only enabled
with W=1, but since linux/jhash.h is included in over hundred places
(including other global headers) it seems worthwhile fixing this
warning.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2017-07-14 23:03:49 -07:00 committed by David S. Miller
parent 533da29b58
commit 13c401f33e
1 changed files with 14 additions and 15 deletions
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29
include/linux/jhash.h
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@ -85,19 +85,18 @@ static inline u32 jhash(const void *key, u32 length, u32 initval)
k += 12;
}
/* Last block: affect all 32 bits of (c) */
/* All the case statements fall through */
switch (length) {
case 12: c += (u32)k[11]<<24;
case 11: c += (u32)k[10]<<16;
case 10: c += (u32)k[9]<<8;
case 9: c += k[8];
case 8: b += (u32)k[7]<<24;
case 7: b += (u32)k[6]<<16;
case 6: b += (u32)k[5]<<8;
case 5: b += k[4];
case 4: a += (u32)k[3]<<24;
case 3: a += (u32)k[2]<<16;
case 2: a += (u32)k[1]<<8;
case 12: c += (u32)k[11]<<24; /* fall through */
case 11: c += (u32)k[10]<<16; /* fall through */
case 10: c += (u32)k[9]<<8; /* fall through */
case 9: c += k[8]; /* fall through */
case 8: b += (u32)k[7]<<24; /* fall through */
case 7: b += (u32)k[6]<<16; /* fall through */
case 6: b += (u32)k[5]<<8; /* fall through */
case 5: b += k[4]; /* fall through */
case 4: a += (u32)k[3]<<24; /* fall through */
case 3: a += (u32)k[2]<<16; /* fall through */
case 2: a += (u32)k[1]<<8; /* fall through */
case 1: a += k[0];
__jhash_final(a, b, c);
case 0: /* Nothing left to add */
@ -131,10 +130,10 @@ static inline u32 jhash2(const u32 *k, u32 length, u32 initval)
k += 3;
}
/* Handle the last 3 u32's: all the case statements fall through */
/* Handle the last 3 u32's */
switch (length) {
case 3: c += k[2];
case 2: b += k[1];
case 3: c += k[2]; /* fall through */
case 2: b += k[1]; /* fall through */
case 1: a += k[0];
__jhash_final(a, b, c);
case 0: /* Nothing left to add */