aboutsummaryrefslogtreecommitdiffstats
path: root/fs/userfaultfd.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2018-02-11 14:34:03 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-02-11 14:34:03 -0800
commita9a08845e9acbd224e4ee466f5c1275ed50054e8 (patch)
tree415d6e6a82e001c65e6b161539411f54ba5fe8ce /fs/userfaultfd.c
parentee5daa1361fceb6f482c005bcc9ba8d01b92ea5c (diff)
vfs: do bulk POLL* -> EPOLL* replacement
This is the mindless scripted replacement of kernel use of POLL* variables as described by Al, done by this script: for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'` for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done done with de-mangling cleanups yet to come. NOTE! On almost all architectures, the EPOLL* constants have the same values as the POLL* constants do. But they keyword here is "almost". For various bad reasons they aren't the same, and epoll() doesn't actually work quite correctly in some cases due to this on Sparc et al. The next patch from Al will sort out the final differences, and we should be all done. Scripted-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/userfaultfd.c')
-rw-r--r--fs/userfaultfd.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c
index 87a13a7c8270..cec550c8468f 100644
--- a/fs/userfaultfd.c
+++ b/fs/userfaultfd.c
@@ -483,7 +483,7 @@ int handle_userfault(struct vm_fault *vmf, unsigned long reason)
if (likely(must_wait && !READ_ONCE(ctx->released) &&
(return_to_userland ? !signal_pending(current) :
!fatal_signal_pending(current)))) {
- wake_up_poll(&ctx->fd_wqh, POLLIN);
+ wake_up_poll(&ctx->fd_wqh, EPOLLIN);
schedule();
ret |= VM_FAULT_MAJOR;
@@ -614,7 +614,7 @@ static void userfaultfd_event_wait_completion(struct userfaultfd_ctx *ctx,
spin_unlock(&ctx->event_wqh.lock);
- wake_up_poll(&ctx->fd_wqh, POLLIN);
+ wake_up_poll(&ctx->fd_wqh, EPOLLIN);
schedule();
spin_lock(&ctx->event_wqh.lock);
@@ -904,7 +904,7 @@ wakeup:
/* Flush pending events that may still wait on event_wqh */
wake_up_all(&ctx->event_wqh);
- wake_up_poll(&ctx->fd_wqh, POLLHUP);
+ wake_up_poll(&ctx->fd_wqh, EPOLLHUP);
userfaultfd_ctx_put(ctx);
return 0;
}
@@ -949,14 +949,14 @@ static __poll_t userfaultfd_poll(struct file *file, poll_table *wait)
switch (ctx->state) {
case UFFD_STATE_WAIT_API:
- return POLLERR;
+ return EPOLLERR;
case UFFD_STATE_RUNNING:
/*
* poll() never guarantees that read won't block.
* userfaults can be waken before they're read().
*/
if (unlikely(!(file->f_flags & O_NONBLOCK)))
- return POLLERR;
+ return EPOLLERR;
/*
* lockless access to see if there are pending faults
* __pollwait last action is the add_wait_queue but
@@ -970,14 +970,14 @@ static __poll_t userfaultfd_poll(struct file *file, poll_table *wait)
ret = 0;
smp_mb();
if (waitqueue_active(&ctx->fault_pending_wqh))
- ret = POLLIN;
+ ret = EPOLLIN;
else if (waitqueue_active(&ctx->event_wqh))
- ret = POLLIN;
+ ret = EPOLLIN;
return ret;
default:
WARN_ON_ONCE(1);
- return POLLERR;
+ return EPOLLERR;
}
}

Privacy Policy