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author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-05-21 18:12:52 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-05-21 18:12:52 +0200 |
commit | a0e31f3a38e77612ed8967aaad28db6d3ee674b5 (patch) | |
tree | 4b42bf285e9555893f94561e22d180cef1c19265 /kernel/dma/ops_helpers.c | |
parent | Merge tag 'modules-for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kerne... (diff) | |
parent | signalfd: Remove SIL_PERF_EVENT fields from signalfd_siginfo (diff) | |
download | linux-a0e31f3a38e77612ed8967aaad28db6d3ee674b5.tar.xz linux-a0e31f3a38e77612ed8967aaad28db6d3ee674b5.zip |
Merge branch 'for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull siginfo fix from Eric Biederman:
"During the merge window an issue with si_perf and the siginfo ABI came
up. The alpha and sparc siginfo structure layout had changed with the
addition of SIGTRAP TRAP_PERF and the new field si_perf.
The reason only alpha and sparc were affected is that they are the
only architectures that use si_trapno.
Looking deeper it was discovered that si_trapno is used for only a few
select signals on alpha and sparc, and that none of the other
_sigfault fields past si_addr are used at all. Which means technically
no regression on alpha and sparc.
While the alignment concerns might be dismissed the abuse of si_errno
by SIGTRAP TRAP_PERF does have the potential to cause regressions in
existing userspace.
While we still have time before userspace starts using and depending
on the new definition siginfo for SIGTRAP TRAP_PERF this set of
changes cleans up siginfo_t.
- The si_trapno field is demoted from magic alpha and sparc status
and made an ordinary union member of the _sigfault member of
siginfo_t. Without moving it of course.
- si_perf is replaced with si_perf_data and si_perf_type ending the
abuse of si_errno.
- Unnecessary additions to signalfd_siginfo are removed"
* 'for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
signalfd: Remove SIL_PERF_EVENT fields from signalfd_siginfo
signal: Deliver all of the siginfo perf data in _perf
signal: Factor force_sig_perf out of perf_sigtrap
signal: Implement SIL_FAULT_TRAPNO
siginfo: Move si_trapno inside the union inside _si_fault
Diffstat (limited to 'kernel/dma/ops_helpers.c')
0 files changed, 0 insertions, 0 deletions