diff options
| author | Mark Salter <msalter@redhat.com> | 2014-04-07 15:39:48 -0700 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-05-23 19:27:34 +0100 |
| commit | fbc223483b269e451312552f5daf5ecba6c87df8 (patch) | |
| tree | 93b5129cf1eacb81311e735a32fd172e2bfb12be /mm/Kconfig | |
| parent | b029d457835437482947aaedd542617909e46694 (diff) | |
mm: create generic early_ioremap() support
This patch creates a generic implementation of early_ioremap() support
based on the existing x86 implementation. early_ioremp() is useful for
early boot code which needs to temporarily map I/O or memory regions
before normal mapping functions such as ioremap() are available.
Some architectures have optional MMU. In the no-MMU case, the remap
functions simply return the passed in physical address and the unmap
functions do nothing.
Signed-off-by: Mark Salter <msalter@redhat.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit 9e5c33d7aeeef62e5fa7e74f94432685bd03026b)
Signed-off-by: Mark Brown <broonie@linaro.org>
Conflicts:
mm/Kconfig
mm/Makefile
Diffstat (limited to 'mm/Kconfig')
| -rw-r--r-- | mm/Kconfig | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index e742d06285b7..19b2bd2f6a61 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -477,3 +477,6 @@ config FRONTSWAP and swap data is stored as normal on the matching swap device. If unsure, say Y to enable frontswap. + +config GENERIC_EARLY_IOREMAP + bool |