From: David Gibson <david@gibson.dropbear.id.au>

The 32->64 bit syscall translation layer on ppc64 incorrectly
sign-extends rather than zero-extending the second parameter to
shmget(), which should be a size_t.  This means that it is impossible
to shmget() more 2GB or more from a 32-bit process.


---

 25-akpm/arch/ppc64/kernel/sys_ppc32.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -puN arch/ppc64/kernel/sys_ppc32.c~ppc64-shmget-translation-bugfix arch/ppc64/kernel/sys_ppc32.c
--- 25/arch/ppc64/kernel/sys_ppc32.c~ppc64-shmget-translation-bugfix	2004-04-29 23:01:43.803208144 -0700
+++ 25-akpm/arch/ppc64/kernel/sys_ppc32.c	2004-04-29 23:01:43.808207384 -0700
@@ -1666,7 +1666,7 @@ asmlinkage long sys32_ipc(u32 call, u32 
 		err = sys_shmdt((char *)AA(ptr));
 		break;
 	case SHMGET:
-		err = sys_shmget(first, second, third);
+		err = sys_shmget(first, second_parm, third);
 		break;
 	case SHMCTL:
 		err = do_sys32_shmctl(first, second, (void *)AA(ptr));

_