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| author | Heiko Carstens <hca@linux.ibm.com> | 2024-10-10 18:52:39 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-11-01 03:58:24 +0300 |
| commit | 9221ae88c20511d08817b2956a8b7a5611db931f (patch) | |
| tree | f33ce1f7a926b28a676544311dcf655945429fd2 /arch/s390 | |
| parent | 1ded6b12499e6dee9b0e1ceac633be36538f6fc2 (diff) | |
| download | linux-9221ae88c20511d08817b2956a8b7a5611db931f.tar.xz | |
s390: Initialize psw mask in perf_arch_fetch_caller_regs()
[ Upstream commit 223e7fb979fa06934f1595b6ad0ae1d4ead1147f ]
Also initialize regs->psw.mask in perf_arch_fetch_caller_regs().
This way user_mode(regs) will return false, like it should.
It looks like all current users initialize regs to zero, so that this
doesn't fix a bug currently. However it is better to not rely on callers
to do this.
Fixes: 914d52e46490 ("s390: implement perf_arch_fetch_caller_regs")
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/perf_event.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/perf_event.h b/arch/s390/include/asm/perf_event.h index 9917e2717b2b..66aff768f815 100644 --- a/arch/s390/include/asm/perf_event.h +++ b/arch/s390/include/asm/perf_event.h @@ -73,6 +73,7 @@ struct perf_sf_sde_regs { #define SAMPLE_FREQ_MODE(hwc) (SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FREQ_MODE) #define perf_arch_fetch_caller_regs(regs, __ip) do { \ + (regs)->psw.mask = 0; \ (regs)->psw.addr = (__ip); \ (regs)->gprs[15] = (unsigned long)__builtin_frame_address(0) - \ offsetof(struct stack_frame, back_chain); \ |