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[09/13,3.18-stable] infiniband: mlx5: avoid a compile-time warning

Message ID 20170504205209.498721-10-arnd@arndb.de
State Superseded
Headers show
Series backported build fixes | expand

Commit Message

Arnd Bergmann May 4, 2017, 8:52 p.m. UTC 
Commit 7835bfb5261501590a508b3de3379e2231cb4853 upstream.

The return type of find_first_bit() is architecture specific,
on ARM it is 'unsigned int', while the asm-generic code used
on x86 and a lot of other architectures returns 'unsigned long'.

When building the mlx5 driver on ARM, we get a warning about
this:

infiniband/hw/mlx5/mem.c: In function 'mlx5_ib_cont_pages':
infiniband/hw/mlx5/mem.c:84:143: warning: comparison of distinct pointer types lacks a cast
     m = min(m, find_first_bit(&tmp, sizeof(tmp)));

This patch changes the driver to use min_t to make it behave
the same way on all architectures.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Acked-by: Eli Cohen <eli@mellanox.com>

Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

---
 drivers/infiniband/hw/mlx5/mem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.9.0
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Patch

diff --git a/drivers/infiniband/hw/mlx5/mem.c b/drivers/infiniband/hw/mlx5/mem.c
index dae07eae9507..0a9b2ae93874 100644
--- a/drivers/infiniband/hw/mlx5/mem.c
+++ b/drivers/infiniband/hw/mlx5/mem.c
@@ -69,7 +69,7 @@  void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, int *count, int *shift,
 		for (k = 0; k < len; k++) {
 			if (!(i & mask)) {
 				tmp = (unsigned long)pfn;
-				m = min(m, find_first_bit(&tmp, sizeof(tmp)));
+				m = min_t(unsigned long, m, find_first_bit(&tmp, sizeof(tmp)));
 				skip = 1 << m;
 				mask = skip - 1;
 				base = pfn;