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authorKyle McMartin <kmcmartin@redhat.com>2012-02-28 02:02:56 +0400
committerRoland Dreier <roland@purestorage.com>2012-03-05 22:12:35 +0400
commitbd50f8924c684f84416fb58c11eb24619b041f25 (patch)
tree1663476c9a64c9bc9afd900b79404523936aaea5 /Documentation
parent6aeaa48b0dd3a4261804be1cccaea46d82be3fcb (diff)
downloadlinux-bd50f8924c684f84416fb58c11eb24619b041f25.tar.xz
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>
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