Linux-2.6.12-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!
diff --git a/include/asm-generic/unaligned.h b/include/asm-generic/unaligned.h
new file mode 100644
index 0000000..c856a43e
--- /dev/null
+++ b/include/asm-generic/unaligned.h
@@ -0,0 +1,121 @@
+#ifndef _ASM_GENERIC_UNALIGNED_H_
+#define _ASM_GENERIC_UNALIGNED_H_
+
+/*
+ * For the benefit of those who are trying to port Linux to another
+ * architecture, here are some C-language equivalents.
+ *
+ * This is based almost entirely upon Richard Henderson's
+ * asm-alpha/unaligned.h implementation. Some comments were
+ * taken from David Mosberger's asm-ia64/unaligned.h header.
+ */
+
+#include <linux/types.h>
+
+/*
+ * The main single-value unaligned transfer routines.
+ */
+#define get_unaligned(ptr) \
+ ((__typeof__(*(ptr)))__get_unaligned((ptr), sizeof(*(ptr))))
+#define put_unaligned(x,ptr) \
+ __put_unaligned((unsigned long)(x), (ptr), sizeof(*(ptr)))
+
+/*
+ * This function doesn't actually exist. The idea is that when
+ * someone uses the macros below with an unsupported size (datatype),
+ * the linker will alert us to the problem via an unresolved reference
+ * error.
+ */
+extern void bad_unaligned_access_length(void) __attribute__((noreturn));
+
+struct __una_u64 { __u64 x __attribute__((packed)); };
+struct __una_u32 { __u32 x __attribute__((packed)); };
+struct __una_u16 { __u16 x __attribute__((packed)); };
+
+/*
+ * Elemental unaligned loads
+ */
+
+static inline unsigned long __uldq(const __u64 *addr)
+{
+ const struct __una_u64 *ptr = (const struct __una_u64 *) addr;
+ return ptr->x;
+}
+
+static inline unsigned long __uldl(const __u32 *addr)
+{
+ const struct __una_u32 *ptr = (const struct __una_u32 *) addr;
+ return ptr->x;
+}
+
+static inline unsigned long __uldw(const __u16 *addr)
+{
+ const struct __una_u16 *ptr = (const struct __una_u16 *) addr;
+ return ptr->x;
+}
+
+/*
+ * Elemental unaligned stores
+ */
+
+static inline void __ustq(__u64 val, __u64 *addr)
+{
+ struct __una_u64 *ptr = (struct __una_u64 *) addr;
+ ptr->x = val;
+}
+
+static inline void __ustl(__u32 val, __u32 *addr)
+{
+ struct __una_u32 *ptr = (struct __una_u32 *) addr;
+ ptr->x = val;
+}
+
+static inline void __ustw(__u16 val, __u16 *addr)
+{
+ struct __una_u16 *ptr = (struct __una_u16 *) addr;
+ ptr->x = val;
+}
+
+static inline unsigned long __get_unaligned(const void *ptr, size_t size)
+{
+ unsigned long val;
+ switch (size) {
+ case 1:
+ val = *(const __u8 *)ptr;
+ break;
+ case 2:
+ val = __uldw((const __u16 *)ptr);
+ break;
+ case 4:
+ val = __uldl((const __u32 *)ptr);
+ break;
+ case 8:
+ val = __uldq((const __u64 *)ptr);
+ break;
+ default:
+ bad_unaligned_access_length();
+ };
+ return val;
+}
+
+static inline void __put_unaligned(unsigned long val, void *ptr, size_t size)
+{
+ switch (size) {
+ case 1:
+ *(__u8 *)ptr = val;
+ break;
+ case 2:
+ __ustw(val, (__u16 *)ptr);
+ break;
+ case 4:
+ __ustl(val, (__u32 *)ptr);
+ break;
+ case 8:
+ __ustq(val, (__u64 *)ptr);
+ break;
+ default:
+ bad_unaligned_access_length();
+ };
+}
+
+#endif /* _ASM_GENERIC_UNALIGNED_H */