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authorArnd Bergmann <arnd@arndb.de>2009-05-13 22:56:30 +0000
committerArnd Bergmann <arnd@klappe2.(none)>2009-06-11 21:02:17 +0200
commit5b17e1cd8928ae65932758ce6478ac6d3e9a86b2 (patch)
tree065b3adc60a74ce0b3e3cd0fc447b8688b6d0332 /include/asm-generic/uaccess-unaligned.h
parent72099ed2719fc5829bd79c6ca9d1783ed026eb37 (diff)
asm-generic: rename page.h and uaccess.h
The current asm-generic/page.h only contains the get_order function, and asm-generic/uaccess.h only implements unaligned accesses. This renames the file to getorder.h and uaccess-unaligned.h to make room for new page.h and uaccess.h file that will be usable by all simple (e.g. nommu) architectures. Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'include/asm-generic/uaccess-unaligned.h')
-rw-r--r--include/asm-generic/uaccess-unaligned.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/include/asm-generic/uaccess-unaligned.h b/include/asm-generic/uaccess-unaligned.h
new file mode 100644
index 00000000000..67deb898f0c
--- /dev/null
+++ b/include/asm-generic/uaccess-unaligned.h
@@ -0,0 +1,26 @@
+#ifndef __ASM_GENERIC_UACCESS_UNALIGNED_H
+#define __ASM_GENERIC_UACCESS_UNALIGNED_H
+
+/*
+ * This macro should be used instead of __get_user() when accessing
+ * values at locations that are not known to be aligned.
+ */
+#define __get_user_unaligned(x, ptr) \
+({ \
+ __typeof__ (*(ptr)) __x; \
+ __copy_from_user(&__x, (ptr), sizeof(*(ptr))) ? -EFAULT : 0; \
+ (x) = __x; \
+})
+
+
+/*
+ * This macro should be used instead of __put_user() when accessing
+ * values at locations that are not known to be aligned.
+ */
+#define __put_user_unaligned(x, ptr) \
+({ \
+ __typeof__ (*(ptr)) __x = (x); \
+ __copy_to_user((ptr), &__x, sizeof(*(ptr))) ? -EFAULT : 0; \
+})
+
+#endif /* __ASM_GENERIC_UACCESS_UNALIGNED_H */