Testing with the new 5.0.0-rc1 amd-staging-drm-next branch results in
this commit causing the attached lockup on init with my Raven + Polaris
system:
10117450735c7a7c0858095fb46a860e7037cb9a is the first bad commit
commit 10117450735c7a7c0858095fb46a860e7037cb9a
Author: ndesaulniers@xxxxxxxxxx <ndesaulniers@xxxxxxxxxx>
Date: Thu Jan 24 16:52:59 2019 -0800
drm/amd/display: add -msse2 to prevent Clang from emitting libcalls
to undefined SW FP routines
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.
Link:
https://gcc.gnu.org/onlinedocs/gccint/Soft-float-library-routines.html
Link: https://github.com/ClangBuiltLinux/linux/issues/327
Cc: stable@xxxxxxxxxxxxxxx # 4.19
Reported-by: S, Shirish <Shirish.S@xxxxxxx>
Reported-by: Matthias Kaehlcke <mka@xxxxxxxxxx>
Suggested-by: James Y Knight <jyknight@xxxxxxxxxx>
Suggested-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Tested-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Tested-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
Tested-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx>
Signed-off-by: Harry Wentland <harry.wentland@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
:040000 040000 39f89ea177b8a69a3a2aa098aef8b1a7e58056b9
71edb262be0608ffae0996253f47492b2e714b5c M drivers
Cheers,
Tom
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