diff options
author | Al Viro <viro@ftp.linux.org.uk> | 2007-10-29 05:11:28 +0000 |
---|---|---|
committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-29 07:41:33 -0700 |
commit | 142956af525002c5378e7d91d81a01189841a785 (patch) | |
tree | bcf73cc0e2d56d8d46d470fcedaadf42ae0602bd /include | |
parent | 0c7eb2eb800c4afb2205bbaa1bc633eb29082fef (diff) |
fix abuses of ptrdiff_t
Use of ptrdiff_t in places like
- if (!access_ok(VERIFY_WRITE, u_tmp->rx_buf, u_tmp->len))
+ if (!access_ok(VERIFY_WRITE, (u8 __user *)
+ (ptrdiff_t) u_tmp->rx_buf,
+ u_tmp->len))
is wrong; for one thing, it's a bad C (it's what uintptr_t is for; in general
we are not even promised that ptrdiff_t is large enough to hold a pointer,
just enough to hold a difference between two pointers within the same object).
For another, it confuses the fsck out of sparse.
Use unsigned long or uintptr_t instead. There are several places misusing
ptrdiff_t; fixed.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/types.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/types.h b/include/linux/types.h index 4f0dad21c917..f4f8d19158e4 100644 --- a/include/linux/types.h +++ b/include/linux/types.h @@ -37,6 +37,8 @@ typedef __kernel_gid32_t gid_t; typedef __kernel_uid16_t uid16_t; typedef __kernel_gid16_t gid16_t; +typedef unsigned long uintptr_t; + #ifdef CONFIG_UID16 /* This is defined by include/asm-{arch}/posix_types.h */ typedef __kernel_old_uid_t old_uid_t; |