[PATCH] remove duplicated sys_open32() code from 64bit archs

64 bit architectures all implement their own compatibility sys_open(),
when in fact the difference is simply not forcing the O_LARGEFILE
flag.  So use the a common function instead.

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Cc: <viro@parcelfarce.linux.theplanet.co.uk>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

10 files changed, 26 insertions, 122 deletions

diff --git a/arch/ia64/ia32/ia32_entry.S b/arch/ia64/ia32/ia32_entry.S
index 829a6d80711c..0708edb06cc4 100644
--- a/arch/ia64/ia32/ia32_entry.S
+++ b/arch/ia64/ia32/ia32_entry.S
@@ -215,7 +215,7 @@ ia32_syscall_table:
         data8 sys32_fork
         data8 sys_read
         data8 sys_write
-        data8 sys32_open          /* 5 */
+        data8 compat_sys_open     /* 5 */
         data8 sys_close
         data8 sys32_waitpid
         data8 sys_creat
diff --git a/arch/ia64/ia32/sys_ia32.c b/arch/ia64/ia32/sys_ia32.c
index c1e20d65dd6c..e29a8a55486a 100644
--- a/arch/ia64/ia32/sys_ia32.c
+++ b/arch/ia64/ia32/sys_ia32.c
@@ -2359,37 +2359,6 @@ sys32_brk (unsigned int brk)
         return ret;
 }
 
-/*
- * Exactly like fs/open.c:sys_open(), except that it doesn't set the O_LARGEFILE flag.
- */
-asmlinkage long
-sys32_open (const char __user * filename, int flags, int mode)
-{
-        char * tmp;
-        int fd, error;
-
-        tmp = getname(filename);
-        fd = PTR_ERR(tmp);
-        if (!IS_ERR(tmp)) {
-                fd = get_unused_fd();
-                if (fd >= 0) {
-                        struct file *f = filp_open(tmp, flags, mode);
-                        error = PTR_ERR(f);
-                        if (IS_ERR(f))
-                                goto out_error;
-                        fd_install(fd, f);
-                }
-out:
-                putname(tmp);
-        }
-        return fd;
-
-out_error:
-        put_unused_fd(fd);
-        fd = error;
-        goto out;
-}
-
 /* Structure for ia32 emulation on ia64 */
 struct epoll_event32
 {
diff --git a/arch/ppc64/kernel/misc.S b/arch/ppc64/kernel/misc.S
index 474df0a862bf..2164bd7b4ef6 100644
--- a/arch/ppc64/kernel/misc.S
+++ b/arch/ppc64/kernel/misc.S
@@ -957,7 +957,7 @@ _GLOBAL(sys_call_table32)
         .llong .ppc_fork
         .llong .sys_read
         .llong .sys_write
-        .llong .sys32_open              /* 5 */
+        .llong .compat_sys_open         /* 5 */
         .llong .sys_close
         .llong .sys32_waitpid
         .llong .sys32_creat
diff --git a/arch/ppc64/kernel/sys_ppc32.c b/arch/ppc64/kernel/sys_ppc32.c
index 206619080e66..214914a95a50 100644
--- a/arch/ppc64/kernel/sys_ppc32.c
+++ b/arch/ppc64/kernel/sys_ppc32.c
@@ -867,37 +867,6 @@ off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
         return sys_lseek(fd, (int)offset, origin);
 }
 
-/*
- * This is just a version for 32-bit applications which does
- * not force O_LARGEFILE on.
- */
-asmlinkage long sys32_open(const char __user * filename, int flags, int mode)
-{
-        char * tmp;
-        int fd, error;
-
-        tmp = getname(filename);
-        fd = PTR_ERR(tmp);
-        if (!IS_ERR(tmp)) {
-                fd = get_unused_fd();
-                if (fd >= 0) {
-                        struct file * f = filp_open(tmp, flags, mode);
-                        error = PTR_ERR(f);
-                        if (IS_ERR(f))
-                                goto out_error;
-                        fd_install(fd, f);
-                }
-out:
-                putname(tmp);
-        }
-        return fd;
-
-out_error:
-        put_unused_fd(fd);
-        fd = error;
-        goto out;
-}
-
 /* Note: it is necessary to treat bufsiz as an unsigned int,
  * with the corresponding cast to a signed int to insure that the 
  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
diff --git a/arch/sparc64/kernel/sys_sparc32.c b/arch/sparc64/kernel/sys_sparc32.c
index 1d3aa588df8a..7f6239ed2521 100644
--- a/arch/sparc64/kernel/sys_sparc32.c
+++ b/arch/sparc64/kernel/sys_sparc32.c
@@ -1002,29 +1002,7 @@ asmlinkage long sys32_adjtimex(struct timex32 __user *utp)
 asmlinkage long sparc32_open(const char __user *filename,
                              int flags, int mode)
 {
-        char * tmp;
-        int fd, error;
-
-        tmp = getname(filename);
-        fd = PTR_ERR(tmp);
-        if (!IS_ERR(tmp)) {
-                fd = get_unused_fd();
-                if (fd >= 0) {
-                        struct file * f = filp_open(tmp, flags, mode);
-                        error = PTR_ERR(f);
-                        if (IS_ERR(f))
-                                goto out_error;
-                        fd_install(fd, f);
-                }
-out:
-                putname(tmp);
-        }
-        return fd;
-
-out_error:
-        put_unused_fd(fd);
-        fd = error;
-        goto out;
+        return do_sys_open(filename, flags, mode);
 }
 
 extern unsigned long do_mremap(unsigned long addr,
diff --git a/arch/x86_64/ia32/ia32entry.S b/arch/x86_64/ia32/ia32entry.S
index c45d6a05b984..f174083d5567 100644
--- a/arch/x86_64/ia32/ia32entry.S
+++ b/arch/x86_64/ia32/ia32entry.S
@@ -307,7 +307,7 @@ ia32_sys_call_table:
         .quad stub32_fork
         .quad sys_read
         .quad sys_write
-        .quad sys32_open                /* 5 */
+        .quad compat_sys_open           /* 5 */
         .quad sys_close
         .quad sys32_waitpid
         .quad sys_creat
diff --git a/arch/x86_64/ia32/sys_ia32.c b/arch/x86_64/ia32/sys_ia32.c
index be996d1b691e..04d80406ce4f 100644
--- a/arch/x86_64/ia32/sys_ia32.c
+++ b/arch/x86_64/ia32/sys_ia32.c
@@ -969,32 +969,6 @@ long sys32_kill(int pid, int sig)
         return sys_kill(pid, sig);
 }
  
-asmlinkage long sys32_open(const char __user * filename, int flags, int mode)
-{
-        char * tmp;
-        int fd, error;
-
-        /* don't force O_LARGEFILE */
-        tmp = getname(filename);
-        fd = PTR_ERR(tmp);
-        if (!IS_ERR(tmp)) {
-                fd = get_unused_fd();
-                if (fd >= 0) {
-                        struct file *f = filp_open(tmp, flags, mode);
-                        error = PTR_ERR(f);
-                        if (IS_ERR(f)) {
-                                put_unused_fd(fd); 
-                                fd = error;
-                        } else {
-                                fsnotify_open(f->f_dentry);
-                                fd_install(fd, f);
-                        }
-                }
-                putname(tmp);
-        }
-        return fd;
-}
-
 extern asmlinkage long
 sys_timer_create(clockid_t which_clock,
                  struct sigevent __user *timer_event_spec,
diff --git a/fs/compat.c b/fs/compat.c
index 2eb03c49b07c..8c665705c6a0 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1275,6 +1275,16 @@ out:
 }
 
 /*
+ * Exactly like fs/open.c:sys_open(), except that it doesn't set the
+ * O_LARGEFILE flag.
+ */
+asmlinkage long
+compat_sys_open(const char __user *filename, int flags, int mode)
+{
+        return do_sys_open(filename, flags, mode);
+}
+
+/*
  * compat_count() counts the number of arguments/envelopes. It is basically
  * a copy of count() from fs/exec.c, except that it works with 32 bit argv
  * and envp pointers.
diff --git a/fs/open.c b/fs/open.c
index 32bf05e2996d..4ee2dcc31c28 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -933,16 +933,11 @@ void fastcall fd_install(unsigned int fd, struct file * file)
 
 EXPORT_SYMBOL(fd_install);
 
-asmlinkage long sys_open(const char __user * filename, int flags, int mode)
+long do_sys_open(const char __user *filename, int flags, int mode)
 {
-        char * tmp;
-        int fd;
+        char *tmp = getname(filename);
+        int fd = PTR_ERR(tmp);
 
-        if (force_o_largefile())
-                flags |= O_LARGEFILE;
-
-        tmp = getname(filename);
-        fd = PTR_ERR(tmp);
         if (!IS_ERR(tmp)) {
                 fd = get_unused_fd();
                 if (fd >= 0) {
@@ -959,6 +954,14 @@ asmlinkage long sys_open(const char __user * filename, int flags, int mode)
         }
         return fd;
 }
+
+asmlinkage long sys_open(const char __user *filename, int flags, int mode)
+{
+        if (force_o_largefile())
+                flags |= O_LARGEFILE;
+
+        return do_sys_open(filename, flags, mode);
+}
 EXPORT_SYMBOL_GPL(sys_open);
 
 #ifndef __alpha__
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 57e294bf83f4..7e1b589842af 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1280,6 +1280,7 @@ static inline int break_lease(struct inode *inode, unsigned int mode)
 /* fs/open.c */
 
 extern int do_truncate(struct dentry *, loff_t start);
+extern long do_sys_open(const char __user *filename, int flags, int mode);
 extern struct file *filp_open(const char *, int, int);
 extern struct file * dentry_open(struct dentry *, struct vfsmount *, int);
 extern int filp_close(struct file *, fl_owner_t id);