wait4(2)/waitid(2): separate copying rusage to userland

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New helpers: kernel_waitid() and kernel_wait4().  sys_waitid(),
sys_wait4() and their compat variants switched to those.  Copying
struct rusage to userland is left to syscall itself.  For
compat_sys_wait4() that eliminates the use of set_fs() completely.
For compat_sys_waitid() it's still needed (for siginfo handling);
that will change shortly.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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Al Viro 2017-05-14 20:25:02 -04:00

parent 7e95a22590

commit ce72a16fa7

3 changed files with 59 additions and 48 deletions

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2

include/linux/resource.h

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89

kernel/exit.c

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16

kernel/sys.c

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