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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/ppc64/lib/usercopy.c | |
download | blackbird-op-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz blackbird-op-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/ppc64/lib/usercopy.c')
-rw-r--r-- | arch/ppc64/lib/usercopy.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/ppc64/lib/usercopy.c b/arch/ppc64/lib/usercopy.c new file mode 100644 index 000000000000..5eea6f3c1e03 --- /dev/null +++ b/arch/ppc64/lib/usercopy.c @@ -0,0 +1,41 @@ +/* + * Functions which are too large to be inlined. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ +#include <linux/module.h> +#include <asm/uaccess.h> + +unsigned long copy_from_user(void *to, const void __user *from, unsigned long n) +{ + if (likely(access_ok(VERIFY_READ, from, n))) + n = __copy_from_user(to, from, n); + else + memset(to, 0, n); + return n; +} + +unsigned long copy_to_user(void __user *to, const void *from, unsigned long n) +{ + if (likely(access_ok(VERIFY_WRITE, to, n))) + n = __copy_to_user(to, from, n); + return n; +} + +unsigned long copy_in_user(void __user *to, const void __user *from, + unsigned long n) +{ + might_sleep(); + if (likely(access_ok(VERIFY_READ, from, n) && + access_ok(VERIFY_WRITE, to, n))) + n =__copy_tofrom_user(to, from, n); + return n; +} + +EXPORT_SYMBOL(copy_from_user); +EXPORT_SYMBOL(copy_to_user); +EXPORT_SYMBOL(copy_in_user); + |