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exit: add kernel_waitid_prepare() helper

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Move the setup logic out of kernel_waitid(), and into a separate helper.

No functional changes intended in this patch.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2023-07-11 10:38:23 -06:00
parent 06a101ca45
commit eda7e9d409
1 changed files with 25 additions and 13 deletions
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38
kernel/exit.c
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@ -1662,14 +1662,13 @@ static long do_wait(struct wait_opts *wo)
return retval;
}
static long kernel_waitid(int which, pid_t upid, struct waitid_info *infop,
int options, struct rusage *ru)
static int kernel_waitid_prepare(struct wait_opts *wo, int which, pid_t upid,
struct waitid_info *infop, int options,
struct rusage *ru)
{
struct wait_opts wo;
unsigned int f_flags = 0;
struct pid *pid = NULL;
enum pid_type type;
long ret;
unsigned int f_flags = 0;
if (options & ~(WNOHANG|WNOWAIT|WEXITED|WSTOPPED|WCONTINUED|
__WNOTHREAD|__WCLONE|__WALL))
@ -1712,19 +1711,32 @@ static long kernel_waitid(int which, pid_t upid, struct waitid_info *infop,
return -EINVAL;
}
wo.wo_type = type;
wo.wo_pid = pid;
wo.wo_flags = options;
wo.wo_info = infop;
wo.wo_rusage = ru;
wo->wo_type = type;
wo->wo_pid = pid;
wo->wo_flags = options;
wo->wo_info = infop;
wo->wo_rusage = ru;
if (f_flags & O_NONBLOCK)
wo.wo_flags |= WNOHANG;
wo->wo_flags |= WNOHANG;
return 0;
}
static long kernel_waitid(int which, pid_t upid, struct waitid_info *infop,
int options, struct rusage *ru)
{
struct wait_opts wo;
long ret;
ret = kernel_waitid_prepare(&wo, which, upid, infop, options, ru);
if (ret)
return ret;
ret = do_wait(&wo);
if (!ret && !(options & WNOHANG) && (f_flags & O_NONBLOCK))
if (!ret && !(options & WNOHANG) && (wo.wo_flags & WNOHANG))
ret = -EAGAIN;
put_pid(pid);
put_pid(wo.wo_pid);
return ret;
}