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| author |   Vasily Gorbik <gor@linux.ibm.com> | 2019-11-25 13:34:59 +0100 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2019-11-30 10:52:47 +0100 |
| commit | 4ac24c092b4eef69b2436ee4d478500dc886e8b5 (patch) | |
| tree | e313e5c73958572c5a3266c0597932aea9403db2 /arch/arm64 | |
| parent | s390/test_unwind: require that unwinding ended successfully (diff) | |
| download | linux-dev-4ac24c092b4eef69b2436ee4d478500dc886e8b5.tar.xz linux-dev-4ac24c092b4eef69b2436ee4d478500dc886e8b5.zip | |
s390: fix register clobbering in CALL_ON_STACK
CALL_ON_STACK defines and initializes register variables. Inline
assembly which follows might trigger compiler to generate memory access
for "stack" argument (e.g. in case of S390_lowcore.nodat_stack). This
memory access produces a function call under kasan with outline
instrumentation which clobbers registers.
Switch "stack" argument in CALL_ON_STACK helper to use memory reference
constraint and perform load instead.
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/arm64')
0 files changed, 0 insertions, 0 deletions