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fs/quota: use COMPAT_SYSCALL_DEFINE for sys32_quotactl()

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While sys32_quotactl() is only needed on x86, it can use the recommended
COMPAT_SYSCALL_DEFINEx() machinery for its setup.

Acked-by: Jan Kara <jack@suse.cz>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Dominik Brodowski 2018-03-04 21:54:05 +01:00
parent cb0b476ab1
commit ab0d1e85bf
5 changed files with 8 additions and 6 deletions
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2
arch/x86/entry/syscalls/syscall_32.tbl
View File

@ -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

5
fs/quota/compat.c
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@ -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;

3
include/linux/compat.h
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@ -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,

2
include/linux/syscalls.h
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@ -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,

2
kernel/sys_ni.c
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@ -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);