tree 1663476c9a64c9bc9afd900b79404523936aaea5
parent 6aeaa48b0dd3a4261804be1cccaea46d82be3fcb
author Kyle McMartin <kmcmartin@redhat.com> 1330380176 -0500
committer Roland Dreier <roland@purestorage.com> 1330971155 -0800

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>