The patch titled
unaligned: introduce common header
has been removed from the -mm tree. Its filename was
unaligned-introduce-common-header.patch
This patch was dropped because an updated version will be merged
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: unaligned: introduce common header
From: Harvey Harrison <harvey.harrison@xxxxxxxxx>
There are two common cases in the kernel, one where unaligned access is OK
for an arch and one where the arch uses a packed-struct for the native
endianness and opencoded C byteshifting for the other endianness.
Consolidate these two implementations in asm-generic/unaligned.h
Arches that require no special handling of unaligned access can define
_UNALIGNED_ACCESS_OK in their asm/unaligned.h before including the generic
version.
Signed-off-by: Harvey Harrison <harvey.harrison@xxxxxxxxx>
Cc: Greg Ungerer <gerg@xxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Roman Zippel <zippel@xxxxxxxxxxxxxx>
Cc: Richard Henderson <rth@xxxxxxxxxxx>
Cc: Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>
Cc: Haavard Skinnemoen <hskinnemoen@xxxxxxxxx>
Cc: Bryan Wu <bryan.wu@xxxxxxxxxx>
Cc: "Luck, Tony" <tony.luck@xxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Kyle McMartin <kyle@xxxxxxxxxxx>
Cc: Grant Grundler <grundler@xxxxxxxxxxxxxxxx>
Cc: Paul Mundt <lethal@xxxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Chris Zankel <zankel@xxxxxxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
Cc: Russell King <rmk@xxxxxxxxxxxxxxxx>
Cc: Hirokazu Takata <takata@xxxxxxxxxxxxxx>
Cc: <linux-arch@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/asm-generic/unaligned.h | 323 ++++++++++++++++++++++++++++++
1 file changed, 323 insertions(+)
diff -puN /dev/null include/asm-generic/unaligned.h
--- /dev/null
+++ a/include/asm-generic/unaligned.h
@@ -0,0 +1,323 @@
+#ifndef _ASM_GENERIC_UNALIGNED_H
+#define _ASM_GENERIC_UNALIGNED_H
+
+#include <linux/types.h>
+#include <asm/byteorder.h>
+
+#ifdef _UNALIGNED_ACCESS_OK
+
+static inline u16 get_unaligned_le16(const void *p)
+{
+ return le16_to_cpup(p);
+}
+
+static inline u32 get_unaligned_le32(const void *p)
+{
+ return le32_to_cpup(p);
+}
+
+static inline u64 get_unaligned_le64(const void *p)
+{
+ return le64_to_cpup(p);
+}
+
+static inline u16 get_unaligned_be16(const void *p)
+{
+ return be16_to_cpup(p);
+}
+
+static inline u32 get_unaligned_be32(const void *p)
+{
+ return be32_to_cpup(p);
+}
+
+static inline u64 get_unaligned_be64(const void *p)
+{
+ return be64_to_cpup(p);
+}
+
+static inline void put_unaligned_le16(u16 val, void *p)
+{
+ *(__le16 *)p = cpu_to_le16(val);
+}
+
+static inline void put_unaligned_le32(u32 val, void *p)
+{
+ *(__le32 *)p = cpu_to_le32(val);
+}
+
+static inline void put_unaligned_le64(u64 val, void *p)
+{
+ *(__le64 *)p = cpu_to_le64(val);
+}
+
+static inline void put_unaligned_be16(u16 val, void *p)
+{
+ *(__be16 *)p = cpu_to_be16(val);
+}
+
+static inline void put_unaligned_be32(u32 val, void *p)
+{
+ *(__be32 *)p = cpu_to_be32(val);
+}
+
+static inline void put_unaligned_be64(u64 val, void *p)
+{
+ *(__be64 *)p = cpu_to_be64(val);
+}
+
+#else /* _UNALIGNED_ACCESS_OK */
+
+struct __una_u16 { u16 x __attribute__((packed)); };
+struct __una_u32 { u32 x __attribute__((packed)); };
+struct __una_u64 { u64 x __attribute__((packed)); };
+
+static inline u16 __get_le16_noalign(const u8 *p)
+{
+ return p[0] | p[1] << 8;
+}
+
+static inline u32 __get_le32_noalign(const u8 *p)
+{
+ return p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24;
+}
+
+static inline u64 __get_le64_noalign(const u8 *p)
+{
+ return ((u64)__get_le32_noalign(p + 4) << 32) | __get_le32_noalign(p);
+}
+
+static inline u16 __get_be16_noalign(const u8 *p)
+{
+ return p[0] << 8 | p[1];
+}
+
+static inline u32 __get_be32_noalign(const u8 *p)
+{
+ return p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
+}
+
+static inline u64 __get_be64_noalign(const u8 *p)
+{
+ return ((u64)__get_be32_noalign(p) << 32) | __get_be32_noalign(p + 4);
+}
+
+static inline u16 get_unaligned_le16(const void *p)
+{
+#ifdef __LITTLE_ENDIAN
+ return ((const struct __una_u16 *)p)->x;
+#else
+ return __get_le16_noalign(p);
+#endif
+}
+
+static inline u32 get_unaligned_le32(const void *p)
+{
+#ifdef __LITTLE_ENDIAN
+ return ((const struct __una_u32 *)p)->x;
+#else
+ return __get_le32_noalign(p);
+#endif
+}
+
+static inline u16 get_unaligned_le64(const void *p)
+{
+#ifdef __LITTLE_ENDIAN
+ return ((const struct __una_u64 *)p)->x;
+#else
+ return __get_le64_noalign(p);
+#endif
+}
+
+static inline u16 get_unaligned_be16(const void *p)
+{
+#ifdef __BIG_ENDIAN
+ return ((const struct __una_u16 *)p)->x;
+#else
+ return __get_be16_noalign(p);
+#endif
+}
+
+static inline u32 get_unaligned_be32(const void *p)
+{
+#ifdef __BIG_ENDIAN
+ return ((const struct __una_u32 *)p)->x;
+#else
+ return __get_be32_noalign(p);
+#endif
+}
+
+static inline u16 get_unaligned_be64(const void *p)
+{
+#ifdef __BIG_ENDIAN
+ return ((const struct __una_u64 *)p)->x;
+#else
+ return __get_be64_noalign(p);
+#endif
+}
+
+static inline void __put_le16_noalign(u8 *p, u16 val)
+{
+ *p++ = val;
+ *p++ = val >> 8;
+}
+
+static inline void __put_le32_noalign(u8 *p, u32 val)
+{
+ __put_le16_noalign(p + 2, val >> 16);
+ __put_le16_noalign(p, val);
+}
+
+static inline void __put_le64_noalign(u8 *p, u64 val)
+{
+ __put_le32_noalign(p + 4, val >> 32);
+ __put_le32_noalign(p, val);
+}
+
+static inline void __put_be16_noalign(u8 *p, u16 val)
+{
+ *p++ = val >> 8;
+ *p++ = val;
+}
+
+static inline void __put_be32_noalign(u8 *p, u32 val)
+{
+ __put_be16_noalign(p, val >> 16);
+ __put_be16_noalign(p + 2, val);
+}
+
+static inline void __put_be64_noalign(u8 *p, u64 val)
+{
+ __put_be32_noalign(p, val >> 32);
+ __put_be32_noalign(p + 4, val);
+}
+
+static inline void put_unaligned_le16(u16 val, void *p)
+{
+#ifdef __LITTLE_ENDIAN
+ ((struct __una_u16 *)p)->x = val;
+#else
+ __put_le16_noalign(p, val);
+#endif
+}
+
+static inline void put_unaligned_le32(u32 val, void *p)
+{
+#ifdef __LITTLE_ENDIAN
+ ((struct __una_u32 *)p)->x = val;
+#else
+ __put_le32_noalign(p, val);
+#endif
+}
+
+static inline void put_unaligned_le64(u64 val, void *p)
+{
+#ifdef __LITTLE_ENDIAN
+ ((struct __una_u64 *)p)->x = val;
+#else
+ __put_le64_noalign(p, val);
+#endif
+}
+
+static inline void put_unaligned_be16(u16 val, void *p)
+{
+#ifdef __BIG_ENDIAN
+ ((struct __una_u16 *)p)->x = val;
+#else
+ __put_be16_noalign(p, val);
+#endif
+}
+
+static inline void put_unaligned_be32(u32 val, void *p)
+{
+#ifdef __BIG_ENDIAN
+ ((struct __una_u32 *)p)->x = val;
+#else
+ __put_be32_noalign(p, val);
+#endif
+}
+
+static inline void put_unaligned_be64(u64 val, void *p)
+{
+#ifdef __BIG_ENDIAN
+ ((struct __una_u64 *)p)->x = val;
+#else
+ __put_be64_noalign(p, val);
+#endif
+}
+
+#endif /* _UNALIGNED_ACCESS_OK */
+
+/*
+ * Cause a link-time error if we try an unaligned access other than
+ * 1,2,4 or 8 bytes long
+ */
+extern void __bad_unaligned_access_size(void);
+
+#define __get_unaligned_le(ptr) ((__force typeof(*(ptr)))({ \
+ __builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
+ __builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_le16((ptr)), \
+ __builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_le32((ptr)), \
+ __builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_le64((ptr)), \
+ __bad_unaligned_access_size())))); \
+ }))
+
+#define __get_unaligned_be(ptr) ((__force typeof(*(ptr)))({ \
+ __builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
+ __builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_be16((ptr)), \
+ __builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_be32((ptr)), \
+ __builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_be64((ptr)), \
+ __bad_unaligned_access_size())))); \
+ }))
+
+#define __put_unaligned_le(val, ptr) ({ \
+ void *__gu_p = (ptr); \
+ switch (sizeof(*(ptr))) { \
+ case 1: \
+ *(u8 *)__gu_p = (__force u8)(val); \
+ break; \
+ case 2: \
+ put_unaligned_le16((__force u16)(val), __gu_p); \
+ break; \
+ case 4: \
+ put_unaligned_le32((__force u32)(val), __gu_p); \
+ break; \
+ case 8: \
+ put_unaligned_le64((__force u64)(val), __gu_p); \
+ break; \
+ default: \
+ __bad_unaligned_access_size(); \
+ break; \
+ } \
+ (void)0; })
+
+#define __put_unaligned_be(val, ptr) ({ \
+ void *__gu_p = (ptr); \
+ switch (sizeof(*(ptr))) { \
+ case 1: \
+ *(u8 *)__gu_p = (__force u8)(val); \
+ break; \
+ case 2: \
+ put_unaligned_be16((__force u16)(val), __gu_p); \
+ break; \
+ case 4: \
+ put_unaligned_be32((__force u32)(val), __gu_p); \
+ break; \
+ case 8: \
+ put_unaligned_be64((__force u64)(val), __gu_p); \
+ break; \
+ default: \
+ __bad_unaligned_access_size(); \
+ break; \
+ } \
+ (void)0; })
+
+#ifdef __LITTLE_ENDIAN
+# define get_unaligned __get_unaligned_le
+# define put_unaligned __put_unaligned_le
+#else
+# define get_unaligned __get_unaligned_be
+# define put_unaligned __put_unaligned_be
+#endif
+
+#endif /* _ASM_GENERIC_UNALIGNED_H */
_
Patches currently in -mm which might be from harvey.harrison@xxxxxxxxx are
linux-next.patch
arm-use-the-new-byteorder-headers.patch
i2c-misannotation-in-i2c-pmcmspc.patch
i2c-trivial-endian-casting-fixes-in-i2c-highlanderc.patch
ia64-use-the-new-byteorder-headers.patch
input-ads7846c-sparse-lock-annotation.patch
m32r-use-the-new-byteorder-headers.patch
blackfin-remove-__function__-in-new-serial-driver.patch
blackfin-use-the-new-byteorder-headers.patch
parisc-use-the-new-byteorder-headers.patch
s390-use-the-new-byteorder-headers.patch
scsi-replace-__inline-with-inline.patch
scsi-use-the-common-hex_asc-array-rather-than-a-private-one.patch
scsi-gdthc-use-unaligned-access-helpers.patch
scsi-annotate-gdth_rdcap_data-gdth_rdcap16_data-endianness.patch
frv-use-the-new-byteorder-headers.patch
m68knommu-use-the-new-byteorder-headers.patch
h8300-use-the-new-byteorder-headers.patch
alpha-use-the-new-byteorder-headers.patch
lib-fix-sparse-shadowed-variable-warning.patch
lib-radix_treec-make-percpu-variable-static.patch
lib-proportionsc-trivial-sparse-lock-annotation.patch
ibmpex-add-endian-annotation-to-extract_data-helper.patch
blackfin-remove-__function__-in-video-driver.patch
fb-carminefb-trivial-annotation-packing-color-register.patch
memstick-annotate-endianness-of-attribute-structs.patch
unaligned-introduce-common-header.patch
unaligned-introduce-common-header-fix.patch
unaligned-introduce-common-header-fix-2.patch
unaligned-convert-arches-where-unaligned-access-is-ok.patch
unaligned-use-generic-implementation-on-packed-struct-arches.patch
unaligned-remove-packed-struct-and-unaligned-access_ok-headers.patch
unaligned-pack-the-struct-not-the-struct-members.patch
unaligned-move-arm-m32r-h8300-to-the-asm-generic-version.patch
unaligned-remove-last-bits-of-the-unaligned-access-helpers.patch
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