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Subject[PATCH 19/45] fs/quota: use COMPAT_SYSCALL_DEFINE for sys32_quotactl()
Date
While sys32_quotactl() is only needed on x86, it can use the recommended
COMPAT_SYSCALL_DEFINEx() machinery for its setup.

Cc: Jan Kara <jack@suse.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
---
arch/x86/entry/syscalls/syscall_32.tbl | 2 +-
fs/quota/compat.c | 5 +++--
include/linux/compat.h | 3 +++
include/linux/syscalls.h | 4 +---
kernel/sys_ni.c | 2 +-
5 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
index 2a5e99cff859..09338dd2bd94 100644
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -137,7 +137,7 @@
128 i386 init_module sys_init_module
129 i386 delete_module sys_delete_module
130 i386 get_kernel_syms
-131 i386 quotactl sys_quotactl sys32_quotactl
+131 i386 quotactl sys_quotactl compat_sys_quotactl32
132 i386 getpgid sys_getpgid
133 i386 fchdir sys_fchdir
134 i386 bdflush sys_bdflush
diff --git a/fs/quota/compat.c b/fs/quota/compat.c
index 1577a2fd51f4..c30572857619 100644
--- a/fs/quota/compat.c
+++ b/fs/quota/compat.c
@@ -41,8 +41,9 @@ struct compat_fs_quota_stat {
__u16 qs_iwarnlimit;
};

-asmlinkage long sys32_quotactl(unsigned int cmd, const char __user *special,
- qid_t id, void __user *addr)
+COMPAT_SYSCALL_DEFINE4(quotactl32, unsigned int, cmd,
+ const char __user *, special, qid_t, id,
+ void __user *, addr)
{
unsigned int cmds;
struct if_dqblk __user *dqblk;
diff --git a/include/linux/compat.h b/include/linux/compat.h
index 16c3027074a2..f1649a5e6716 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -461,6 +461,9 @@ asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
const struct compat_iovec __user *vec,
compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);

+asmlinkage long compat_sys_quotactl32(unsigned int cmd,
+ const char __user *special, qid_t id, void __user *addr);
+
#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
asmlinkage long compat_sys_preadv64(unsigned long fd,
const struct compat_iovec __user *vec,
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index f30083190ae4..a3f42f5f3b08 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -241,8 +241,6 @@ static inline void addr_limit_user_check(void)
#endif
}

-asmlinkage long sys32_quotactl(unsigned int cmd, const char __user *special,
- qid_t id, void __user *addr);
asmlinkage long sys_time(time_t __user *tloc);
asmlinkage long sys_stime(time_t __user *tptr);
asmlinkage long sys_gettimeofday(struct timeval __user *tv,
@@ -625,7 +623,7 @@ asmlinkage long sys_chdir(const char __user *filename);
asmlinkage long sys_fchdir(unsigned int fd);
asmlinkage long sys_rmdir(const char __user *pathname);
asmlinkage long sys_lookup_dcookie(u64 cookie64, char __user *buf, size_t len);
-asmlinkage long sys_quotactl(unsigned int cmd, const char __user *special,
+asmlinkage long sys_quotactl32(unsigned int cmd, const char __user *special,
qid_t id, void __user *addr);
asmlinkage long sys_getdents(unsigned int fd,
struct linux_dirent __user *dirent,
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index b5189762d275..951dbda5c2b4 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -18,7 +18,7 @@ asmlinkage long sys_ni_syscall(void)
}

cond_syscall(sys_quotactl);
-cond_syscall(sys32_quotactl);
+cond_syscall(compat_sys_quotactl32);
cond_syscall(sys_acct);
cond_syscall(sys_lookup_dcookie);
cond_syscall(compat_sys_lookup_dcookie);
--
2.16.2
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