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authorMikulas Patocka <mpatocka@redhat.com>2013-07-10 23:41:17 +0100
committerAlasdair G Kergon <agk@redhat.com>2013-07-10 23:41:17 +0100
commit43aeaa29573924df76f44eda2bbd94ca36e407b5 (patch)
tree9f05d2afbd800c44c4bed6e51b4524ac06a4ad62 /drivers/md/dm-cache-target.c
parent553d8fe029a561d5921fba495206e64eefea42cb (diff)
dm cache: fix arm link errors with inline
Use __always_inline to avoid a link failure with gcc 4.6 on ARM. gcc 4.7 is OK. It creates a function block_div.part.8, it references __udivdi3 and __umoddi3 and it is never called. The references to __udivdi3 and __umoddi3 cause a link failure. Reported-by: Rob Herring <robherring2@gmail.com> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-cache-target.c')
-rw-r--r--drivers/md/dm-cache-target.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index df44b60e66f2..0df3ec085ebb 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -425,6 +425,10 @@ static bool block_size_is_power_of_two(struct cache *cache)
return cache->sectors_per_block_shift >= 0;
}
+/* gcc on ARM generates spurious references to __udivdi3 and __umoddi3 */
+#if defined(CONFIG_ARM) && __GNUC__ == 4 && __GNUC_MINOR__ <= 6
+__always_inline
+#endif
static dm_block_t block_div(dm_block_t b, uint32_t n)
{
do_div(b, n);