MIRRORS/linux-imx
1
0
Fork 0
mirror of https://github.com/nxp-imx/linux-imx.git synced 2025-07-07 18:05:21 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

s390: Initialize psw mask in perf_arch_fetch_caller_regs()

Browse Source 
[ Upstream commit 223e7fb979 ]

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: 914d52e464 ("s390: implement perf_arch_fetch_caller_regs")
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Heiko Carstens 2024-10-10 17:52:39 +02:00 committed by Greg Kroah-Hartman
parent 1ded6b1249
commit 9221ae88c2
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/s390/include/asm/perf_event.h
View File

@ -73,6 +73,7 @@ struct perf_sf_sde_regs {
#define SAMPLE_FREQ_MODE(hwc) (SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FREQ_MODE) #define SAMPLE_FREQ_MODE(hwc) (SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FREQ_MODE)
#define perf_arch_fetch_caller_regs(regs, __ip) do { \ #define perf_arch_fetch_caller_regs(regs, __ip) do { \
(regs)->psw.mask = 0; \
(regs)->psw.addr = (__ip); \ (regs)->psw.addr = (__ip); \
(regs)->gprs[15] = (unsigned long)__builtin_frame_address(0) - \ (regs)->gprs[15] = (unsigned long)__builtin_frame_address(0) - \
offsetof(struct stack_frame, back_chain); \ offsetof(struct stack_frame, back_chain); \