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| author |   Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2014-05-01 17:49:33 +0200 |
|---|---|---|
| committer | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2014-05-08 10:22:23 +0200 |
| commit | 0567f5facbdf04806a37ef521dd0893159fde715 (patch) | |
| tree | 018f29aa08fd585eaf8d028a29f62f7d99249287 /include/asm-generic | |
| parent | Linux 3.15-rc1 (diff) | |
| download | linux-dev-0567f5facbdf04806a37ef521dd0893159fde715.tar.xz linux-dev-0567f5facbdf04806a37ef521dd0893159fde715.zip | |
asm-generic: allow generic unaligned access if the arch supports it
Switch the default unaligned access method to 'hardware implemented'
if HAVE_EFFICIENT_UNALIGNED_ACCESS is set.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/unaligned.h | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/include/asm-generic/unaligned.h b/include/asm-generic/unaligned.h index 03cf5936bad6..1ac097279db1 100644 --- a/include/asm-generic/unaligned.h +++ b/include/asm-generic/unaligned.h @@ -4,22 +4,27 @@ /* * This is the most generic implementation of unaligned accesses * and should work almost anywhere. - * - * If an architecture can handle unaligned accesses in hardware, - * it may want to use the linux/unaligned/access_ok.h implementation - * instead. */ #include <asm/byteorder.h> +/* Set by the arch if it can handle unaligned accesses in hardware. */ +#ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS +# include <linux/unaligned/access_ok.h> +#endif + #if defined(__LITTLE_ENDIAN) -# include <linux/unaligned/le_struct.h> -# include <linux/unaligned/be_byteshift.h> +# ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS +# include <linux/unaligned/le_struct.h> +# include <linux/unaligned/be_byteshift.h> +# endif # include <linux/unaligned/generic.h> # define get_unaligned __get_unaligned_le # define put_unaligned __put_unaligned_le #elif defined(__BIG_ENDIAN) -# include <linux/unaligned/be_struct.h> -# include <linux/unaligned/le_byteshift.h> +# ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS +# include <linux/unaligned/be_struct.h> +# include <linux/unaligned/le_byteshift.h> +# endif # include <linux/unaligned/generic.h> # define get_unaligned __get_unaligned_be # define put_unaligned __put_unaligned_be |