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authorLinus Torvalds <torvalds@linux-foundation.org>2017-07-05 14:10:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-05 14:10:19 -0700
commit4be95131bf3bca97b6a7db9c6fb63db2cb94da06 (patch)
treec623b98ba6aa37299f5109cb8bd0e53be547c72d /kernel/compat.c
parent3bad2f1c676581d01e7645eb03e9b27e28b0a92e (diff)
parent92ebce5ac55dba258c608248dddf59eca3f7f514 (diff)
downloadlinux-4be95131bf3bca97b6a7db9c6fb63db2cb94da06.tar.bz2
Merge branch 'work.sys_wait' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull wait syscall updates from Al Viro: "Consolidating sys_wait* and compat counterparts. Gets rid of set_fs()/double-copy mess, simplifies the whole thing (lifting the copyouts to the syscalls means less headache in the part that does actual work - fewer failure exits, to start with), gets rid of the overhead of field-by-field __put_user()" * 'work.sys_wait' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: osf_wait4: switch to kernel_wait4() waitid(): switch copyout of siginfo to unsafe_put_user() wait_task_zombie: consolidate info logics kill wait_noreap_copyout() lift getrusage() from wait_noreap_copyout() waitid(2): leave copyout of siginfo to syscall itself kernel_wait4()/kernel_waitid(): delay copying status to userland wait4(2)/waitid(2): separate copying rusage to userland move compat wait4 and waitid next to native variants
Diffstat (limited to 'kernel/compat.c')
-rw-r--r--kernel/compat.c66
1 files changed, 0 insertions, 66 deletions
diff --git a/kernel/compat.c b/kernel/compat.c
index ebd8bdc3fd68..9ce1d4876e60 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -396,72 +396,6 @@ int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru)
return 0;
}
-COMPAT_SYSCALL_DEFINE4(wait4,
- compat_pid_t, pid,
- compat_uint_t __user *, stat_addr,
- int, options,
- struct compat_rusage __user *, ru)
-{
- if (!ru) {
- return sys_wait4(pid, stat_addr, options, NULL);
- } else {
- struct rusage r;
- int ret;
- unsigned int status;
- mm_segment_t old_fs = get_fs();
-
- set_fs (KERNEL_DS);
- ret = sys_wait4(pid,
- (stat_addr ?
- (unsigned int __user *) &status : NULL),
- options, (struct rusage __user *) &r);
- set_fs (old_fs);
-
- if (ret > 0) {
- if (put_compat_rusage(&r, ru))
- return -EFAULT;
- if (stat_addr && put_user(status, stat_addr))
- return -EFAULT;
- }
- return ret;
- }
-}
-
-COMPAT_SYSCALL_DEFINE5(waitid,
- int, which, compat_pid_t, pid,
- struct compat_siginfo __user *, uinfo, int, options,
- struct compat_rusage __user *, uru)
-{
- siginfo_t info;
- struct rusage ru;
- long ret;
- mm_segment_t old_fs = get_fs();
-
- memset(&info, 0, sizeof(info));
-
- set_fs(KERNEL_DS);
- ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options,
- uru ? (struct rusage __user *)&ru : NULL);
- set_fs(old_fs);
-
- if ((ret < 0) || (info.si_signo == 0))
- return ret;
-
- if (uru) {
- /* sys_waitid() overwrites everything in ru */
- if (COMPAT_USE_64BIT_TIME)
- ret = copy_to_user(uru, &ru, sizeof(ru));
- else
- ret = put_compat_rusage(&ru, uru);
- if (ret)
- return -EFAULT;
- }
-
- BUG_ON(info.si_code & __SI_MASK);
- info.si_code |= __SI_CHLD;
- return copy_siginfo_to_user32(uinfo, &info);
-}
-
static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr,
unsigned len, struct cpumask *new_mask)
{