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authorChristoph Hellwig <hch@lst.de>2010-03-10 15:21:19 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-12 15:52:32 -0800
commite28cbf22933d0c0ccaf3c4c27a1a263b41f73859 (patch)
treea93ff48cfd97766a23b2c4f3ea86fccfc9c51d3f /arch/s390
parentbaed7fc9b580bd3fb8252ff1d9b36eaf1f86b670 (diff)
downloadop-kernel-dev-e28cbf22933d0c0ccaf3c4c27a1a263b41f73859.zip
op-kernel-dev-e28cbf22933d0c0ccaf3c4c27a1a263b41f73859.tar.gz
improve sys_newuname() for compat architectures
On an architecture that supports 32-bit compat we need to override the reported machine in uname with the 32-bit value. Instead of doing this separately in every architecture introduce a COMPAT_UTS_MACHINE define in <asm/compat.h> and apply it directly in sys_newuname(). 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> Cc: 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> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/include/asm/compat.h3
-rw-r--r--arch/s390/kernel/compat_wrapper.S2
-rw-r--r--arch/s390/kernel/entry.h2
-rw-r--r--arch/s390/kernel/sys_s390.c11
-rw-r--r--arch/s390/kernel/syscalls.S2
5 files changed, 4 insertions, 16 deletions
diff --git a/arch/s390/include/asm/compat.h b/arch/s390/include/asm/compat.h
index 01a0802..104f200 100644
--- a/arch/s390/include/asm/compat.h
+++ b/arch/s390/include/asm/compat.h
@@ -35,7 +35,8 @@
extern long psw32_user_bits;
-#define COMPAT_USER_HZ 100
+#define COMPAT_USER_HZ 100
+#define COMPAT_UTS_MACHINE "s390\0\0\0\0"
typedef u32 compat_size_t;
typedef s32 compat_ssize_t;
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index 30de2d0..672ce52 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -547,7 +547,7 @@ sys32_setdomainname_wrapper:
.globl sys32_newuname_wrapper
sys32_newuname_wrapper:
llgtr %r2,%r2 # struct new_utsname *
- jg sys_s390_newuname # branch to system call
+ jg sys_newuname # branch to system call
.globl compat_sys_adjtimex_wrapper
compat_sys_adjtimex_wrapper:
diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
index 15fd68b..eb15c12 100644
--- a/arch/s390/kernel/entry.h
+++ b/arch/s390/kernel/entry.h
@@ -24,7 +24,6 @@ int __cpuinit start_secondary(void *cpuvoid);
void __init startup_init(void);
void die(const char * str, struct pt_regs * regs, long err);
-struct new_utsname;
struct s390_mmap_arg_struct;
struct fadvise64_64_args;
struct old_sigaction;
@@ -32,7 +31,6 @@ struct old_sigaction;
long sys_mmap2(struct s390_mmap_arg_struct __user *arg);
long sys_s390_ipc(uint call, int first, unsigned long second,
unsigned long third, void __user *ptr);
-long sys_s390_newuname(struct new_utsname __user *name);
long sys_s390_personality(unsigned long personality);
long sys_s390_fadvise64(int fd, u32 offset_high, u32 offset_low,
size_t len, int advice);
diff --git a/arch/s390/kernel/sys_s390.c b/arch/s390/kernel/sys_s390.c
index b8b7809..7b6b0f8 100644
--- a/arch/s390/kernel/sys_s390.c
+++ b/arch/s390/kernel/sys_s390.c
@@ -131,17 +131,6 @@ SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, unsigned long, second,
}
#ifdef CONFIG_64BIT
-SYSCALL_DEFINE1(s390_newuname, struct new_utsname __user *, name)
-{
- int ret = sys_newuname(name);
-
- if (personality(current->personality) == PER_LINUX32 && !ret) {
- ret = copy_to_user(name->machine, "s390\0\0\0\0", 8);
- if (ret) ret = -EFAULT;
- }
- return ret;
-}
-
SYSCALL_DEFINE1(s390_personality, unsigned long, personality)
{
int ret;
diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index 990ac8b..201ce6b 100644
--- a/arch/s390/kernel/syscalls.S
+++ b/arch/s390/kernel/syscalls.S
@@ -130,7 +130,7 @@ SYSCALL(sys_fsync,sys_fsync,sys32_fsync_wrapper)
SYSCALL(sys_sigreturn,sys_sigreturn,sys32_sigreturn)
SYSCALL(sys_clone,sys_clone,sys_clone_wrapper) /* 120 */
SYSCALL(sys_setdomainname,sys_setdomainname,sys32_setdomainname_wrapper)
-SYSCALL(sys_newuname,sys_s390_newuname,sys32_newuname_wrapper)
+SYSCALL(sys_newuname,sys_newuname,sys32_newuname_wrapper)
NI_SYSCALL /* modify_ldt for i386 */
SYSCALL(sys_adjtimex,sys_adjtimex,compat_sys_adjtimex_wrapper)
SYSCALL(sys_mprotect,sys_mprotect,sys32_mprotect_wrapper) /* 125 */
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