[MIPS] Use generic compat routines for readdir, getdents

    
Not just cleanup but also fixes O32 readdir(2) emulation.
    
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

3 files changed, 3 insertions, 57 deletions

diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index 5f68b220c26d..e00e5f6e7fdd 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -161,60 +161,6 @@ out:
         return error;
 }
 
-struct dirent32 {
-        unsigned int    d_ino;
-        unsigned int    d_off;
-        unsigned short  d_reclen;
-        char            d_name[NAME_MAX + 1];
-};
-
-static void
-xlate_dirent(void *dirent64, void *dirent32, long n)
-{
-        long off;
-        struct dirent *dirp;
-        struct dirent32 *dirp32;
-
-        off = 0;
-        while (off < n) {
-                dirp = (struct dirent *)(dirent64 + off);
-                dirp32 = (struct dirent32 *)(dirent32 + off);
-                off += dirp->d_reclen;
-                dirp32->d_ino = dirp->d_ino;
-                dirp32->d_off = (unsigned int)dirp->d_off;
-                dirp32->d_reclen = dirp->d_reclen;
-                strncpy(dirp32->d_name, dirp->d_name, dirp->d_reclen - ((3 * 4) + 2));
-        }
-        return;
-}
-
-asmlinkage long
-sys32_getdents(unsigned int fd, void * dirent32, unsigned int count)
-{
-        long n;
-        void *dirent64;
-
-        dirent64 = (void *)((unsigned long)(dirent32 + (sizeof(long) - 1)) & ~(sizeof(long) - 1));
-        if ((n = sys_getdents(fd, dirent64, count - (dirent64 - dirent32))) < 0)
-                return(n);
-        xlate_dirent(dirent64, dirent32, n);
-        return(n);
-}
-
-asmlinkage int old_readdir(unsigned int fd, void * dirent, unsigned int count);
-
-asmlinkage int
-sys32_readdir(unsigned int fd, void * dirent32, unsigned int count)
-{
-        int n;
-        struct dirent dirent64;
-
-        if ((n = old_readdir(fd, &dirent64, count)) < 0)
-                return(n);
-        xlate_dirent(&dirent64, dirent32, dirent64.d_reclen);
-        return(n);
-}
-
 asmlinkage int
 sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, int options)
 {
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index d87b5446fa13..02c8267e45e7 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -195,7 +195,7 @@ EXPORT(sysn32_call_table)
         PTR     sys_fdatasync
         PTR     sys_truncate
         PTR     sys_ftruncate                   /* 6075 */
-        PTR     sys32_getdents
+        PTR     compat_sys_getdents
         PTR     sys_getcwd
         PTR     sys_chdir
         PTR     sys_fchdir
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 5b0414018c9a..797e0d874889 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -293,7 +293,7 @@ sys_call_table:
         PTR     sys_uselib
         PTR     sys_swapon
         PTR     sys_reboot
-        PTR     sys32_readdir
+        PTR     compat_sys_old_readdir
         PTR     old_mmap                        /* 4090 */
         PTR     sys_munmap
         PTR     sys_truncate
@@ -345,7 +345,7 @@ sys_call_table:
         PTR     sys_setfsuid
         PTR     sys_setfsgid
         PTR     sys32_llseek                    /* 4140 */
-        PTR     sys32_getdents
+        PTR     compat_sys_getdents
         PTR     compat_sys_select
         PTR     sys_flock
         PTR     sys_msync