From: Al Viro <viro@ftp.linux.org.uk>
To: linux-kernel@vger.kernel.org
Subject: [WTF?] sys_tas() on m32r
Date: Fri, 23 Dec 2005 06:15:56 +0000 [thread overview]
Message-ID: <20051223061556.GR27946@ftp.linux.org.uk> (raw)
asmlinkage int sys_tas(int *addr)
{
int oldval;
unsigned long flags;
if (!access_ok(VERIFY_WRITE, addr, sizeof (int)))
return -EFAULT;
local_irq_save(flags);
oldval = *addr;
if (!oldval)
*addr = 1;
local_irq_restore(flags);
return oldval;
}
in arch/m32r/kernel/sys_m32r.c. Trivial oops *AND* ability to trigger
IO with interrupts disabled.
next reply other threads:[~2005-12-23 6:16 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-23 6:15 Al Viro [this message]
2005-12-23 7:50 ` [WTF?] sys_tas() on m32r liyu
2005-12-23 7:54 ` Al Viro
2005-12-23 13:55 ` Andrew Morton
2005-12-23 19:10 ` Lee Revell
2005-12-27 6:36 ` Hirokazu Takata
2005-12-27 9:34 ` Jesper Juhl
2005-12-27 5:27 ` Hirokazu Takata
2005-12-27 13:22 ` Andrew Morton
2005-12-28 0:36 ` Hirokazu Takata
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