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| author | Pu Hou <bjhoupu@linux.vnet.ibm.com> | 2017-09-05 05:17:24 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-09-13 16:34:23 +0200 |
| commit | fc3100d64f0ae383ae8d845989103da06d62763b (patch) | |
| tree | 76247c79910ab0b5f8519d830cf2441fe3dabec2 /drivers/s390/block/dasd.c | |
| parent | Merge tag 'f2fs-for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/ja... (diff) | |
| download | linux-fc3100d64f0ae383ae8d845989103da06d62763b.tar.xz linux-fc3100d64f0ae383ae8d845989103da06d62763b.zip | |
s390/perf: fix bug when creating per-thread event
A per-thread event could not be created correctly like below:
perf record --per-thread -e rB0000 -- sleep 1
Error:
The sys_perf_event_open() syscall returned with 19 (No such device) for event (rB0000).
/bin/dmesg may provide additional information.
No CONFIG_PERF_EVENTS=y kernel support configured?
This bug was introduced by:
commit c311c797998c1e70eade463dd60b843da4f1a203
Author: Alexey Dobriyan <adobriyan@gmail.com>
Date: Mon May 8 15:56:15 2017 -0700
cpumask: make "nr_cpumask_bits" unsigned
If a per-thread event is not attached to any CPU, the cpu field
in struct perf_event is -1. The above commit converts the CPU number
to unsigned int, which result in an illegal CPU number.
Fixes: c311c797998c ("cpumask: make "nr_cpumask_bits" unsigned")
Cc: <stable@vger.kernel.org> # v4.12+
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Pu Hou <bjhoupu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/block/dasd.c')
0 files changed, 0 insertions, 0 deletions