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| author | Michael Ellerman | 2017-05-19 03:29:04 +0200 |
|---|---|---|
| committer | Michael Ellerman | 2017-05-19 11:46:34 +0200 |
| commit | fe06fe860250a4f01d0eaf70a2563b1997174a74 (patch) | |
| tree | 0bcce900e1a98434d35aa9bf6e9a4dfccc80d800 /arch/powerpc | |
| parent | powerpc/mm: Fix virt_addr_valid() etc. on 64-bit hash (diff) | |
| download | kernel-qcow2-linux-fe06fe860250a4f01d0eaf70a2563b1997174a74.tar.gz kernel-qcow2-linux-fe06fe860250a4f01d0eaf70a2563b1997174a74.tar.xz kernel-qcow2-linux-fe06fe860250a4f01d0eaf70a2563b1997174a74.zip | |
selftests/powerpc: Fix TM resched DSCR test with some compilers
The tm-resched-dscr test has started failing sometimes, depending on
what compiler it's built with, eg:
test: tm_resched_dscr
Check DSCR TM context switch: tm-resched-dscr: tm-resched-dscr.c:76: test_body: Assertion `rv' failed.
!! child died by signal 6
When it fails we see that the compiler doesn't initialise rv to 1 before
entering the inline asm block. Although that's counter intuitive, it
is allowed because we tell the compiler that the inline asm will write
to rv (using "=r"), meaning the original value is irrelevant.
Marking it as a read/write parameter would presumably work, but it seems
simpler to fix it by setting the initial value of rv in the inline asm.
Fixes: 96d016108640 ("powerpc: Correct DSCR during TM context switch")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Michael Neuling <mikey@neuling.org>
Diffstat (limited to 'arch/powerpc')
0 files changed, 0 insertions, 0 deletions