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author | Nick Desaulniers <ndesaulniers@google.com> | 2019-07-23 01:31:05 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-01 09:26:00 +0300 |
commit | 70ec2eecc550e4ca189cd0ab6bdd6a65bb343988 (patch) | |
tree | 702b010363ef813005b1cd6aed61b114c9332e6d /include/rdma | |
parent | 80fc27953e74d664bf946d45feae90df1023327b (diff) | |
download | linux-70ec2eecc550e4ca189cd0ab6bdd6a65bb343988.tar.xz |
drm/amd/display: readd -msse2 to prevent Clang from emitting libcalls to undefined SW FP routines
[ Upstream commit 0f0727d971f6fdf8f1077180d495ddb9928f0c8b ]
arch/x86/Makefile disables SSE and SSE2 for the whole kernel. The
AMDGPU drivers modified in this patch re-enable SSE but not SSE2. Turn
on SSE2 to support emitting double precision floating point instructions
rather than calls to non-existent (usually available from gcc_s or
compiler_rt) floating point helper routines for Clang.
This was originally landed in:
commit 10117450735c ("drm/amd/display: add -msse2 to prevent Clang from emitting libcalls to undefined SW FP routines")
but reverted in:
commit 193392ed9f69 ("Revert "drm/amd/display: add -msse2 to prevent Clang from emitting libcalls to undefined SW FP routines"")
due to bugreports from GCC builds. Add guards to only do so for Clang.
Link: https://bugs.freedesktop.org/show_bug.cgi?id=109487
Link: https://github.com/ClangBuiltLinux/linux/issues/327
Suggested-by: Sedat Dilek <sedat.dilek@gmail.com>
Suggested-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/rdma')
0 files changed, 0 insertions, 0 deletions