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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-11 11:34:36 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 20:15:38 +0200
commit52fb6db0fd6f50ac71475f02b96098fbb1fb3417 (patch)
tree781a546ea25e615de9f7f6870d0bca3dee8d6c8e /fs/signalfd.c
parent791eb22eef0d077df4ddcf633ee6eac038f0431e (diff)
downloadlinux-stericsson-52fb6db0fd6f50ac71475f02b96098fbb1fb3417.tar.gz
fs: add do_signalfd4() helper; remove internal calls to sys_signalfd4()
Using this helper removes in-kernel calls to the sys_signalfd4() syscall function. 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>
Diffstat (limited to 'fs/signalfd.c')
-rw-r--r--fs/signalfd.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/fs/signalfd.c b/fs/signalfd.c
index 76bf9cc62074..501c41f3351f 100644
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -256,8 +256,8 @@ static const struct file_operations signalfd_fops = {
.llseek = noop_llseek,
};
-SYSCALL_DEFINE4(signalfd4, int, ufd, sigset_t __user *, user_mask,
- size_t, sizemask, int, flags)
+static int do_signalfd4(int ufd, sigset_t __user *user_mask, size_t sizemask,
+ int flags)
{
sigset_t sigmask;
struct signalfd_ctx *ctx;
@@ -310,10 +310,16 @@ SYSCALL_DEFINE4(signalfd4, int, ufd, sigset_t __user *, user_mask,
return ufd;
}
+SYSCALL_DEFINE4(signalfd4, int, ufd, sigset_t __user *, user_mask,
+ size_t, sizemask, int, flags)
+{
+ return do_signalfd4(ufd, user_mask, sizemask, flags);
+}
+
SYSCALL_DEFINE3(signalfd, int, ufd, sigset_t __user *, user_mask,
size_t, sizemask)
{
- return sys_signalfd4(ufd, user_mask, sizemask, 0);
+ return do_signalfd4(ufd, user_mask, sizemask, 0);
}
#ifdef CONFIG_COMPAT
@@ -333,7 +339,7 @@ COMPAT_SYSCALL_DEFINE4(signalfd4, int, ufd,
if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
return -EFAULT;
- return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags);
+ return do_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags);
}
COMPAT_SYSCALL_DEFINE3(signalfd, int, ufd,