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authorChristoph Hellwig <hch@lst.de>2010-03-10 15:21:18 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-12 15:52:32 -0800
commitbaed7fc9b580bd3fb8252ff1d9b36eaf1f86b670 (patch)
tree38f23cd9888b92de3f73ed1f4ce48cd83e940e0e /arch/m68k
parenta4679373cf4ee0e7792dc56205365732b725c2c1 (diff)
Add generic sys_ipc wrapper
Add a generic implementation of the ipc demultiplexer syscall. Except for s390 and sparc64 all implementations of the sys_ipc are nearly identical. There are slight differences in the types of the parameters, where mips and powerpc as the only 64-bit architectures with sys_ipc use unsigned long for the "third" argument as it gets casted to a pointer later, while it traditionally is an "int" like most other paramters. frv goes even further and uses unsigned long for all parameters execept for "ptr" which is a pointer type everywhere. The change from int to unsigned long for "third" and back to "int" for the others on frv should be fine due to the in-register calling conventions for syscalls (we already had a similar issue with the generic sys_ptrace), but I'd prefer to have the arch maintainers looks over this in details. Except for that h8300, m68k and m68knommu lack an impplementation of the semtimedop sub call which this patch adds, and various architectures have gets used - at least on i386 it seems superflous as the compat code on x86-64 and ia64 doesn't even bother to implement it. [akpm@linux-foundation.org: add sys_ipc to sys_ni.c] Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Jeff Dike <jdike@addtoit.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Reviewed-by: H. Peter Anvin <hpa@zytor.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: James Morris <jmorris@namei.org> Cc: Andreas Schwab <schwab@linux-m68k.org> Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: David Howells <dhowells@redhat.com> Acked-by: Kyle McMartin <kyle@mcmartin.ca> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/m68k')
-rw-r--r--arch/m68k/include/asm/unistd.h1
-rw-r--r--arch/m68k/kernel/sys_m68k.c81
2 files changed, 1 insertions, 81 deletions
diff --git a/arch/m68k/include/asm/unistd.h b/arch/m68k/include/asm/unistd.h
index d801154310ea..60b15d0aa072 100644
--- a/arch/m68k/include/asm/unistd.h
+++ b/arch/m68k/include/asm/unistd.h
@@ -351,6 +351,7 @@
#define __ARCH_WANT_STAT64
#define __ARCH_WANT_SYS_ALARM
#define __ARCH_WANT_SYS_GETHOSTNAME
+#define __ARCH_WANT_SYS_IPC
#define __ARCH_WANT_SYS_PAUSE
#define __ARCH_WANT_SYS_SGETMASK
#define __ARCH_WANT_SYS_SIGNAL
diff --git a/arch/m68k/kernel/sys_m68k.c b/arch/m68k/kernel/sys_m68k.c
index 7b309e7b6cef..77896692eb0a 100644
--- a/arch/m68k/kernel/sys_m68k.c
+++ b/arch/m68k/kernel/sys_m68k.c
@@ -46,87 +46,6 @@ asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff);
}
-/*
- * sys_ipc() is the de-multiplexer for the SysV IPC calls..
- *
- * This is really horribly ugly.
- */
-asmlinkage int sys_ipc (uint call, int first, int second,
- int third, void __user *ptr, long fifth)
-{
- int version, ret;
-
- version = call >> 16; /* hack for backward compatibility */
- call &= 0xffff;
-
- if (call <= SEMCTL)
- switch (call) {
- case SEMOP:
- return sys_semop (first, ptr, second);
- case SEMGET:
- return sys_semget (first, second, third);
- case SEMCTL: {
- union semun fourth;
- if (!ptr)
- return -EINVAL;
- if (get_user(fourth.__pad, (void __user *__user *) ptr))
- return -EFAULT;
- return sys_semctl (first, second, third, fourth);
- }
- default:
- return -ENOSYS;
- }
- if (call <= MSGCTL)
- switch (call) {
- case MSGSND:
- return sys_msgsnd (first, ptr, second, third);
- case MSGRCV:
- switch (version) {
- case 0: {
- struct ipc_kludge tmp;
- if (!ptr)
- return -EINVAL;
- if (copy_from_user (&tmp, ptr, sizeof (tmp)))
- return -EFAULT;
- return sys_msgrcv (first, tmp.msgp, second,
- tmp.msgtyp, third);
- }
- default:
- return sys_msgrcv (first, ptr,
- second, fifth, third);
- }
- case MSGGET:
- return sys_msgget ((key_t) first, second);
- case MSGCTL:
- return sys_msgctl (first, second, ptr);
- default:
- return -ENOSYS;
- }
- if (call <= SHMCTL)
- switch (call) {
- case SHMAT:
- switch (version) {
- default: {
- ulong raddr;
- ret = do_shmat (first, ptr, second, &raddr);
- if (ret)
- return ret;
- return put_user (raddr, (ulong __user *) third);
- }
- }
- case SHMDT:
- return sys_shmdt (ptr);
- case SHMGET:
- return sys_shmget (first, second, third);
- case SHMCTL:
- return sys_shmctl (first, second, ptr);
- default:
- return -ENOSYS;
- }
-
- return -EINVAL;
-}
-
/* Convert virtual (user) address VADDR to physical address PADDR */
#define virt_to_phys_040(vaddr) \
({ \