3.0.1 compile error on Fedora 15

From: Ben Greear
Date: Mon Aug 08 2011 - 14:43:47 EST

[greearb@t60-ben linux-3.0.p4s]$ make
make -C /home/greearb/git/linux-3.0.dev.y O=/home/greearb/kernel/2.6/linux-3.0.p4s/.
Using /home/greearb/git/linux-3.0.dev.y as source for kernel
GEN /home/greearb/kernel/2.6/linux-3.0.p4s/Makefile
CHK include/linux/version.h
CHK include/generated/utsrelease.h
CALL /home/greearb/git/linux-3.0.dev.y/scripts/checksyscalls.sh
CHK include/generated/compile.h
CC fs/binfmt_misc.o
In file included from /home/greearb/git/linux-3.0.dev.y/arch/x86/include/asm/uaccess.h:570:0,
from /home/greearb/git/linux-3.0.dev.y/include/linux/uaccess.h:5,
from /home/greearb/git/linux-3.0.dev.y/include/linux/highmem.h:7,
from /home/greearb/git/linux-3.0.dev.y/include/linux/pagemap.h:10,
from /home/greearb/git/linux-3.0.dev.y/fs/binfmt_misc.c:26:
/home/greearb/git/linux-3.0.dev.y/arch/x86/include/asm/uaccess_32.h: In function ‘parse_command.part.0’:
/home/greearb/git/linux-3.0.dev.y/arch/x86/include/asm/uaccess_32.h:211:26: error: call to ‘copy_from_user_overflow’ declared with attribute error: copy_from_user() buffer size is not provably correct
make[3]: *** [fs/binfmt_misc.o] Error 1
make[2]: *** [fs] Error 2
make[1]: *** [sub-make] Error 2
make: *** [all] Error 2
[greearb@t60-ben linux-3.0.p4s]$

The code in question is below. Is this missing an assignment to n
in the else branch?

static inline unsigned long __must_check copy_from_user(void *to,
const void __user *from,
unsigned long n)
int sz = __compiletime_object_size(to);

if (likely(sz == -1 || sz >= n))
n = _copy_from_user(to, from, n);

return n;

Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc http://www.candelatech.com
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