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ARM: 8792/1: oabi-compat: copy oabi events using __copy_to_user()

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Copy events to user using __copy_to_user() rather than copy members of
individually with __put_user_error().
This has the benefit of disabling/enabling PAN once per event intead of
once per event member.

Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Julien Thierry 2018-09-11 10:12:49 +01:00 committed by Russell King
parent 3aa2df6ec2
commit 3195089026
1 changed files with 6 additions and 2 deletions
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8
arch/arm/kernel/sys_oabi-compat.c
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@ -277,6 +277,7 @@ asmlinkage long sys_oabi_epoll_wait(int epfd,
int maxevents, int timeout)
{
struct epoll_event *kbuf;
struct oabi_epoll_event e;
mm_segment_t fs;
long ret, err, i;
@ -295,8 +296,11 @@ asmlinkage long sys_oabi_epoll_wait(int epfd,
set_fs(fs);
err = 0;
for (i = 0; i < ret; i++) {
__put_user_error(kbuf[i].events, &events->events, err);
__put_user_error(kbuf[i].data, &events->data, err);
e.events = kbuf[i].events;
e.data = kbuf[i].data;
err = __copy_to_user(events, &e, sizeof(e));
if (err)
break;
events++;
}
kfree(kbuf);