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improve sys_newuname() for compat architectures

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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>
This commit is contained in:
Christoph Hellwig
2010-03-10 15:21:19 -08:00
committed by Linus Torvalds
parent baed7fc9b5
commit e28cbf2293
28 changed files with 36 additions and 123 deletions
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13
arch/powerpc/kernel/syscalls.c
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@@ -132,19 +132,6 @@ static inline int override_machine(char __user *mach)
return 0;
}
long ppc_newuname(struct new_utsname __user * name)
{
int err = 0;
down_read(&uts_sem);
if (copy_to_user(name, utsname(), sizeof(*name)))
err = -EFAULT;
up_read(&uts_sem);
if (!err)
err = override_machine(name->machine);
return err;
}
int sys_uname(struct old_utsname __user *name)
{
int err = 0;