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| author | Arnd Bergmann <[email protected]> | 2021-08-11 07:30:19 +0000 |
|---|---|---|
| committer | Russell King (Oracle) <[email protected]> | 2021-08-20 10:39:25 +0000 |
| commit | 344179fc7ef427910de438affbf3703fed51fe5a (patch) | |
| tree | 63bd7fff6b11fa5e87f938332269992695754cae /tools/perf/scripts/python/net_dropmonitor.py | |
| parent | ARM: 9115/1: mm/maccess: fix unaligned copy_{from,to}_kernel_nofault (diff) | |
| download | kernel-344179fc7ef427910de438affbf3703fed51fe5a.tar.gz kernel-344179fc7ef427910de438affbf3703fed51fe5a.zip | |
ARM: 9106/1: traps: use get_kernel_nofault instead of set_fs()
ARM uses set_fs() and __get_user() to allow the stack dumping code to
access possibly invalid pointers carefully. These can be changed to the
simpler get_kernel_nofault(), and allow the eventual removal of set_fs().
dump_instr() will print either kernel or user space pointers,
depending on how it was called. For dump_mem(), I assume we are only
interested in kernel pointers, and the only time that this is called
with user_mode(regs)==true is when the regs themselves are unreliable
as a result of the condition that caused the trap.
Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Linus Walleij <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
Signed-off-by: Russell King (Oracle) <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/net_dropmonitor.py')
0 files changed, 0 insertions, 0 deletions