diff options
author | Paul Mackerras <paulus@samba.org> | 2005-09-26 02:04:21 -0400 |
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committer | Paul Mackerras <paulus@samba.org> | 2005-09-26 02:04:21 -0400 |
commit | 14cf11af6cf608eb8c23e989ddb17a715ddce109 (patch) | |
tree | 271a97ce73e265f39c569cb159c195c5b4bb3f8c /arch/powerpc/lib/usercopy.c | |
parent | e5baa396af7560382d2cf3f0871d616b61fc284c (diff) |
powerpc: Merge enough to start building in arch/powerpc.
This creates the directory structure under arch/powerpc and a bunch
of Kconfig files. It does a first-cut merge of arch/powerpc/mm,
arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough
to build a 32-bit powermac kernel with ARCH=powerpc.
For now we are getting some unmerged files from arch/ppc/kernel and
arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes
to files in those directories and files outside arch/powerpc.
The boot directory is still not merged. That's going to be interesting.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/lib/usercopy.c')
-rw-r--r-- | arch/powerpc/lib/usercopy.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/powerpc/lib/usercopy.c b/arch/powerpc/lib/usercopy.c new file mode 100644 index 000000000000..5eea6f3c1e03 --- /dev/null +++ b/arch/powerpc/lib/usercopy.c | |||
@@ -0,0 +1,41 @@ | |||
1 | /* | ||
2 | * Functions which are too large to be inlined. | ||
3 | * | ||
4 | * This program is free software; you can redistribute it and/or | ||
5 | * modify it under the terms of the GNU General Public License | ||
6 | * as published by the Free Software Foundation; either version | ||
7 | * 2 of the License, or (at your option) any later version. | ||
8 | */ | ||
9 | #include <linux/module.h> | ||
10 | #include <asm/uaccess.h> | ||
11 | |||
12 | unsigned long copy_from_user(void *to, const void __user *from, unsigned long n) | ||
13 | { | ||
14 | if (likely(access_ok(VERIFY_READ, from, n))) | ||
15 | n = __copy_from_user(to, from, n); | ||
16 | else | ||
17 | memset(to, 0, n); | ||
18 | return n; | ||
19 | } | ||
20 | |||
21 | unsigned long copy_to_user(void __user *to, const void *from, unsigned long n) | ||
22 | { | ||
23 | if (likely(access_ok(VERIFY_WRITE, to, n))) | ||
24 | n = __copy_to_user(to, from, n); | ||
25 | return n; | ||
26 | } | ||
27 | |||
28 | unsigned long copy_in_user(void __user *to, const void __user *from, | ||
29 | unsigned long n) | ||
30 | { | ||
31 | might_sleep(); | ||
32 | if (likely(access_ok(VERIFY_READ, from, n) && | ||
33 | access_ok(VERIFY_WRITE, to, n))) | ||
34 | n =__copy_tofrom_user(to, from, n); | ||
35 | return n; | ||
36 | } | ||
37 | |||
38 | EXPORT_SYMBOL(copy_from_user); | ||
39 | EXPORT_SYMBOL(copy_to_user); | ||
40 | EXPORT_SYMBOL(copy_in_user); | ||
41 | |||