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| author |   Eric W. Biederman <ebiederm@xmission.com> | 2017-07-19 21:30:42 -0500 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2018-01-12 14:21:06 -0600 |
| commit | 8c36fdf5ed48cc17a257e71e168883307ce89b0e (patch) | |
| tree | b4b75b61fc82ae53e94e948902bc45a85ca21dca /fs/fcntl.c | |
| parent | signal/arm: Document conflicts with SI_USER and SIGFPE (diff) | |
| download | linux-dev-8c36fdf5ed48cc17a257e71e168883307ce89b0e.tar.xz linux-dev-8c36fdf5ed48cc17a257e71e168883307ce89b0e.zip | |
signal: Reduce copy_siginfo to just a memcpy
The savings for copying just part of struct siginfo appears to be in the
noise on modern machines. So remove this ``optimization'' and simplify the code.
At the same time mark the second parameter as constant so there is no confusion
as to which direction the copy will go.
This ensures that a fully initialized siginfo that is sent ends up as
a fully initialized siginfo on the signal queue. This full initialization
ensures even confused code won't copy unitialized data to userspace, and
it prepares for turning copy_siginfo_to_user into a simple copy_to_user.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'fs/fcntl.c')
0 files changed, 0 insertions, 0 deletions