[PATCH] consolidate sys_shmat

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/alpha/kernel/osf_sys.c

@@ -457,22 +457,6 @@ osf_getdomainname(char __user *name, int namelen)
 	return 0;
 }
 
-asmlinkage long
-osf_shmat(int shmid, void __user *shmaddr, int shmflg)
-{
-	unsigned long raddr;
-	long err;
-
-	err = do_shmat(shmid, shmaddr, shmflg, &raddr);
-
-	/*
-	 * This works because all user-level addresses are
-	 * non-negative longs!
-	 */
-	return err ? err : (long)raddr;
-}
-
-
 /*
  * The following stuff should move into a header file should it ever
  * be labeled "officially supported."  Right now, there is just enough

arch/alpha/kernel/systbls.S

@@ -227,7 +227,7 @@ sys_call_table:
 	.quad sys_semop
 	.quad osf_utsname
 	.quad sys_lchown
-	.quad osf_shmat
+	.quad sys_shmat
 	.quad sys_shmctl			/* 210 */
 	.quad sys_shmdt
 	.quad sys_shmget

arch/arm/kernel/sys_arm.c

@@ -227,18 +227,6 @@ asmlinkage int sys_ipc(uint call, int first, int second, int third,
 	}
 }
 
-asmlinkage long sys_shmat(int shmid, char __user *shmaddr, int shmflg,
-			  unsigned long __user *addr)
-{
-	unsigned long ret;
-	long err;
-
-	err = do_shmat(shmid, shmaddr, shmflg, &ret);
-	if (err == 0)
-		err = put_user(ret, addr);
-	return err;
-}
-
 /* Fork a new task - this creates a new program thread.
  * This is called indirectly via a small wrapper
  */

arch/ia64/kernel/entry.S

@@ -1417,7 +1417,7 @@ sys_call_table:
 	data8 sys_msgrcv
 	data8 sys_msgctl
 	data8 sys_shmget
-	data8 ia64_shmat
+	data8 sys_shmat
 	data8 sys_shmdt				// 1115
 	data8 sys_shmctl
 	data8 sys_syslog

arch/ia64/kernel/sys_ia64.c

@@ -92,20 +92,6 @@ sys_getpagesize (void)
 	return PAGE_SIZE;
 }
 
-asmlinkage unsigned long
-ia64_shmat (int shmid, void __user *shmaddr, int shmflg)
-{
-	unsigned long raddr;
-	int retval;
-
-	retval = do_shmat(shmid, shmaddr, shmflg, &raddr);
-	if (retval < 0)
-		return retval;
-
-	force_successful_syscall_return();
-	return raddr;
-}
-
 asmlinkage unsigned long
 ia64_brk (unsigned long brk)
 {

arch/mips/kernel/syscall.c

@@ -373,22 +373,6 @@ asmlinkage int sys_ipc (uint call, int first, int second,
 	}
 }
 
-/*
- * Native ABI that is O32 or N64 version
- */
-asmlinkage long sys_shmat(int shmid, char __user *shmaddr,
-                          int shmflg, unsigned long *addr)
-{
-	unsigned long raddr;
-	int err;
-
-	err = do_shmat(shmid, shmaddr, shmflg, &raddr);
-	if (err)
-		return err;
-
-	return put_user(raddr, addr);
-}
-
 /*
  * No implemented yet ...
  */

arch/parisc/kernel/sys_parisc.c

@@ -161,17 +161,6 @@ asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
 	}
 }
 
-long sys_shmat_wrapper(int shmid, char __user *shmaddr, int shmflag)
-{
-	unsigned long raddr;
-	int r;
-
-	r = do_shmat(shmid, shmaddr, shmflag, &raddr);
-	if (r < 0)
-		return r;
-	return raddr;
-}
-
 /* Fucking broken ABI */
 
 #ifdef CONFIG_64BIT

arch/parisc/kernel/syscall_table.S

@@ -297,7 +297,7 @@
 	ENTRY_DIFF(msgrcv)
 	ENTRY_SAME(msgget)		/* 190 */
 	ENTRY_SAME(msgctl)
-	ENTRY_SAME(shmat_wrapper)
+	ENTRY_SAME(shmat)
 	ENTRY_SAME(shmdt)
 	ENTRY_SAME(shmget)
 	ENTRY_SAME(shmctl)		/* 195 */

arch/sh64/kernel/sys_sh64.c

@@ -283,18 +283,3 @@ asmlinkage int sys_uname(struct old_utsname * name)
 	up_read(&uts_sem);
 	return err?-EFAULT:0;
 }
-
-/* Copy from mips version */
-asmlinkage long sys_shmatcall(int shmid, char __user *shmaddr,
-		int shmflg)
-{
-	unsigned long raddr;
-	int err;
-
-	err = do_shmat(shmid, shmaddr, shmflg, &raddr);
-	if (err)
-		return err;
-
-	err = raddr;
-	return err;
-}

arch/sh64/kernel/syscalls.S

@@ -268,7 +268,7 @@ sys_call_table:
 	.long sys_msgrcv
 	.long sys_msgget
 	.long sys_msgctl
-	.long sys_shmatcall
+	.long sys_shmat
 	.long sys_shmdt			/* 245 */
 	.long sys_shmget
 	.long sys_shmctl

arch/um/include/sysdep-x86_64/syscalls.h

@@ -26,7 +26,6 @@ extern syscall_handler_t *ia32_sys_call_table[];
 extern long old_mmap(unsigned long addr, unsigned long len,
 		     unsigned long prot, unsigned long flags,
 		     unsigned long fd, unsigned long pgoff);
-extern syscall_handler_t wrap_sys_shmat;
 extern syscall_handler_t sys_modify_ldt;
 extern syscall_handler_t sys_arch_prctl;
 

arch/um/sys-x86_64/syscalls.c

@@ -14,14 +14,6 @@
 #include "asm/prctl.h" /* XXX This should get the constants from libc */
 #include "choose-mode.h"
 
-/* XXX: copied from x86-64: arch/x86_64/kernel/sys_x86_64.c */
-asmlinkage long wrap_sys_shmat(int shmid, char __user *shmaddr, int shmflg)
-{
-	unsigned long raddr;
-
-	return do_shmat(shmid, shmaddr, shmflg, &raddr) ?: (long) raddr;
-}
-
 asmlinkage long sys_uname64(struct new_utsname __user * name)
 {
 	int err;

arch/x86_64/kernel/sys_x86_64.c

@@ -152,12 +152,6 @@ asmlinkage long sys_uname(struct new_utsname __user * name)
 	return err ? -EFAULT : 0;
 }
 
-asmlinkage long wrap_sys_shmat(int shmid, char __user *shmaddr, int shmflg)
-{
-	unsigned long raddr;
-	return do_shmat(shmid,shmaddr,shmflg,&raddr) ?: (long)raddr;
-}
-
 asmlinkage long sys_time64(long __user * tloc)
 {
 	struct timeval now; 

include/asm-x86_64/unistd.h

@@ -76,7 +76,7 @@ __SYSCALL(__NR_madvise, sys_madvise)
 #define __NR_shmget                             29
 __SYSCALL(__NR_shmget, sys_shmget)
 #define __NR_shmat                              30
-__SYSCALL(__NR_shmat, wrap_sys_shmat)
+__SYSCALL(__NR_shmat, sys_shmat)
 #define __NR_shmctl                             31
 __SYSCALL(__NR_shmctl, sys_shmctl)
 

include/linux/syscalls.h

@@ -456,8 +456,7 @@ asmlinkage long sys_semctl(int semid, int semnum, int cmd, union semun arg);
 asmlinkage long sys_semtimedop(int semid, struct sembuf __user *sops,
 				unsigned nsops,
 				const struct timespec __user *timeout);
-asmlinkage long sys_shmat(int shmid, char __user *shmaddr,
-				int shmflg, unsigned long __user *addr);
+asmlinkage long sys_shmat(int shmid, char __user *shmaddr, int shmflg);
 asmlinkage long sys_shmget(key_t key, size_t size, int flag);
 asmlinkage long sys_shmdt(char __user *shmaddr);
 asmlinkage long sys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf);

ipc/shm.c

@@ -28,6 +28,8 @@
 #include <linux/security.h>
 #include <linux/syscalls.h>
 #include <linux/audit.h>
+#include <linux/ptrace.h>
+
 #include <asm/uaccess.h>
 
 #include "util.h"
@@ -771,6 +773,18 @@ out:
 	return err;
 }
 
+asmlinkage long sys_shmat(int shmid, char __user *shmaddr, int shmflg)
+{
+	unsigned long ret;
+	long err;
+
+	err = do_shmat(shmid, shmaddr, shmflg, &ret);
+	if (err)
+		return err;
+	force_successful_syscall_return();
+	return (long)ret;
+}
+
 /*
  * detach and kill segment if marked destroyed.
  * The work is done in shm_close.

kernel/sys_ni.c

@@ -52,6 +52,7 @@ cond_syscall(sys_msgsnd);
 cond_syscall(sys_msgrcv);
 cond_syscall(sys_msgctl);
 cond_syscall(sys_shmget);
+cond_syscall(sys_shmat);
 cond_syscall(sys_shmdt);
 cond_syscall(sys_shmctl);
 cond_syscall(sys_mq_open);