diff options
| author | Kyle McMartin <kmcmartin@redhat.com> | 2012-02-27 17:02:56 -0500 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2012-03-05 10:12:35 -0800 |
| commit | bd50f8924c684f84416fb58c11eb24619b041f25 (patch) | |
| tree | 1663476c9a64c9bc9afd900b79404523936aaea5 /drivers/infiniband | |
| parent | 6aeaa48b0dd3a4261804be1cccaea46d82be3fcb (diff) | |
| download | linux-bd50f8924c684f84416fb58c11eb24619b041f25.tar.bz2 | |
IB/ehca: Fix ilog2() compile failure
I'm getting compile failures building this driver, which I narrowed
down to the ilog2 call in ehca_get_max_hwpage_size...
ERROR: ".____ilog2_NaN" [drivers/infiniband/hw/ehca/ib_ehca.ko]
undefined!
make[1]: *** [__modpost] Error 1
make: *** [modules] Error 2
The use of shca->hca_cap_mr_pgsize is confusing the compiler, and
resulting in the __builtin_constant_p in ilog2 going insane.
I tried making it take the u32 pgsize as an argument and the expansion
of shca->_pgsize in the caller, but that failed as well.
With this patch in place, the driver compiles on my GCC 4.6.2 here.
Suggested-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Kyle McMartin <kmcmarti@redhat.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/ehca/ehca_mrmw.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/ehca/ehca_mrmw.c b/drivers/infiniband/hw/ehca/ehca_mrmw.c index 43cae84005f0..b781b2cb0624 100644 --- a/drivers/infiniband/hw/ehca/ehca_mrmw.c +++ b/drivers/infiniband/hw/ehca/ehca_mrmw.c @@ -112,7 +112,7 @@ static u32 ehca_encode_hwpage_size(u32 pgsize) static u64 ehca_get_max_hwpage_size(struct ehca_shca *shca) { - return 1UL << ilog2(shca->hca_cap_mr_pgsize); + return rounddown_pow_of_two(shca->hca_cap_mr_pgsize); } static struct ehca_mr *ehca_mr_new(void) |