Commit-ID: 4ee5c0d05ce9b4e48e586a1ee168f166d191ddda
Gitweb: http://git.kernel.org/tip/4ee5c0d05ce9b4e48e586a1ee168f166d191ddda
Author: H. J. Lu <hjl.tools@xxxxxxxxx>
AuthorDate: Tue, 14 Feb 2012 13:30:41 -0800
Committer: H. Peter Anvin <hpa@xxxxxxxxx>
CommitDate: Mon, 20 Feb 2012 12:48:48 -0800
compat: Create compat_sys_p{read,write}v64
For 32-bit ABIs which have real 64-bit registers, we don't want to
break the position argument into two. However, we still need compat
support to deal with 32-bit pointers, so we can't just use
sys_p{read,write} directly.
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxx>
---
fs/compat.c | 26 ++++++++++++++++++++------
1 files changed, 20 insertions(+), 6 deletions(-)
diff --git a/fs/compat.c b/fs/compat.c
index fa9d721..83d751c 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1177,10 +1177,9 @@ compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec,
}
asmlinkage ssize_t
-compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec,
- unsigned long vlen, u32 pos_low, u32 pos_high)
+compat_sys_preadv64(unsigned long fd, const struct compat_iovec __user *vec,
+ unsigned long vlen, loff_t pos)
{
- loff_t pos = ((loff_t)pos_high << 32) | pos_low;
struct file *file;
int fput_needed;
ssize_t ret;
@@ -1197,6 +1196,14 @@ compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec,
return ret;
}
+asmlinkage ssize_t
+compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec,
+ unsigned long vlen, u32 pos_low, u32 pos_high)
+{
+ loff_t pos = ((loff_t)pos_high << 32) | pos_low;
+ return compat_sys_preadv64(fd, vec, vlen, pos);
+}
+
static size_t compat_writev(struct file *file,
const struct compat_iovec __user *vec,
unsigned long vlen, loff_t *pos)
@@ -1236,10 +1243,9 @@ compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec,
}
asmlinkage ssize_t
-compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec,
- unsigned long vlen, u32 pos_low, u32 pos_high)
+compat_sys_pwritev64(unsigned long fd, const struct compat_iovec __user *vec,
+ unsigned long vlen, loff_t pos)
{
- loff_t pos = ((loff_t)pos_high << 32) | pos_low;
struct file *file;
int fput_needed;
ssize_t ret;
@@ -1256,6 +1262,14 @@ compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec,
return ret;
}
+asmlinkage ssize_t
+compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec,
+ unsigned long vlen, u32 pos_low, u32 pos_high)
+{
+ loff_t pos = ((loff_t)pos_high << 32) | pos_low;
+ return compat_sys_pwritev64(fd, vec, vlen, pos);
+}
+
asmlinkage long
compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
unsigned int nr_segs, unsigned int flags)
--
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