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| author | Heiko Carstens <hca@linux.ibm.com> | 2024-10-10 17:52:39 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-11-01 01:56:00 +0100 |
| commit | 318ca89bc578cad4cec2cd65ca9569a3c1b697be (patch) | |
| tree | 4d8e10a3f5edf056fd2f46b2debc3b54c3ad4e47 /arch | |
| parent | bee1b68cb8bcee4fd3a8bde3a4886e0b1375dc4d (diff) | |
| download | linux-318ca89bc578cad4cec2cd65ca9569a3c1b697be.tar.gz linux-318ca89bc578cad4cec2cd65ca9569a3c1b697be.tar.bz2 linux-318ca89bc578cad4cec2cd65ca9569a3c1b697be.zip | |
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')
| -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 b9da71632827..ea340b901839 100644 --- a/arch/s390/include/asm/perf_event.h +++ b/arch/s390/include/asm/perf_event.h @@ -75,6 +75,7 @@ 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); \ |