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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-11 11:34:30 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 20:15:37 +0200
commit791eb22eef0d077df4ddcf633ee6eac038f0431e (patch)
tree85d17bcff2149aa82b380c44d6eccbf63e22e900
parentfs: add do_futimesat() helper; remove internal call to sys_futimesat() (diff)
downloadlinux-791eb22eef0d077df4ddcf633ee6eac038f0431e.tar.xz
linux-791eb22eef0d077df4ddcf633ee6eac038f0431e.zip
fs: add do_epoll_*() helpers; remove internal calls to sys_epoll_*()
Using the helper functions do_epoll_create() and do_epoll_wait() allows us to remove in-kernel calls to the related syscall functions. This patch is part of a series which removes in-kernel calls to syscalls. On this basis, the syscall entry path can be streamlined. For details, see http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
-rw-r--r--fs/eventpoll.c23
1 files changed, 17 insertions, 6 deletions
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 0f3494ed3ed0..602ca4285b2e 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1936,7 +1936,7 @@ static void clear_tfile_check_list(void)
/*
* Open an eventpoll file descriptor.
*/
-SYSCALL_DEFINE1(epoll_create1, int, flags)
+static int do_epoll_create(int flags)
{
int error, fd;
struct eventpoll *ep = NULL;
@@ -1979,12 +1979,17 @@ out_free_ep:
return error;
}
+SYSCALL_DEFINE1(epoll_create1, int, flags)
+{
+ return do_epoll_create(flags);
+}
+
SYSCALL_DEFINE1(epoll_create, int, size)
{
if (size <= 0)
return -EINVAL;
- return sys_epoll_create1(0);
+ return do_epoll_create(0);
}
/*
@@ -2148,8 +2153,8 @@ error_return:
* Implement the event wait interface for the eventpoll file. It is the kernel
* part of the user space epoll_wait(2).
*/
-SYSCALL_DEFINE4(epoll_wait, int, epfd, struct epoll_event __user *, events,
- int, maxevents, int, timeout)
+static int do_epoll_wait(int epfd, struct epoll_event __user *events,
+ int maxevents, int timeout)
{
int error;
struct fd f;
@@ -2190,6 +2195,12 @@ error_fput:
return error;
}
+SYSCALL_DEFINE4(epoll_wait, int, epfd, struct epoll_event __user *, events,
+ int, maxevents, int, timeout)
+{
+ return do_epoll_wait(epfd, events, maxevents, timeout);
+}
+
/*
* Implement the event wait interface for the eventpoll file. It is the kernel
* part of the user space epoll_pwait(2).
@@ -2214,7 +2225,7 @@ SYSCALL_DEFINE6(epoll_pwait, int, epfd, struct epoll_event __user *, events,
set_current_blocked(&ksigmask);
}
- error = sys_epoll_wait(epfd, events, maxevents, timeout);
+ error = do_epoll_wait(epfd, events, maxevents, timeout);
/*
* If we changed the signal mask, we need to restore the original one.
@@ -2257,7 +2268,7 @@ COMPAT_SYSCALL_DEFINE6(epoll_pwait, int, epfd,
set_current_blocked(&ksigmask);
}
- err = sys_epoll_wait(epfd, events, maxevents, timeout);
+ err = do_epoll_wait(epfd, events, maxevents, timeout);
/*
* If we changed the signal mask, we need to restore the original one.