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| author |   Russell King <rmk@arm.linux.org.uk> | 2010-03-10 15:23:53 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-12 15:52:44 -0800 |
| commit | 5ceaa2f39bfa73c4398cd01e78f1c3ebde3d3383 (patch) | |
| tree | a33b0a472d42c1b744eaeb0efff2e9b6a234e4d4 /include/linux/decompress | |
| parent | sgi-gru: use for_each_set_bit() (diff) | |
| download | linux-dev-5ceaa2f39bfa73c4398cd01e78f1c3ebde3d3383.tar.xz linux-dev-5ceaa2f39bfa73c4398cd01e78f1c3ebde3d3383.zip | |
decompress: fix new decompressor for PIC
The ARM kernel decompressor wants to be able to relocate r/w data
independently from the rest of the image, and we do this by ensuring that
r/w data has global visibility. Define STATIC_RW_DATA to be empty to
achieve this.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Alain Knaff <alain@knaff.lu>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/decompress')
| -rw-r--r-- | include/linux/decompress/mm.h | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/include/linux/decompress/mm.h b/include/linux/decompress/mm.h index 5032b9a31ae7..ad5ec1d0475e 100644 --- a/include/linux/decompress/mm.h +++ b/include/linux/decompress/mm.h @@ -14,11 +14,21 @@ /* Code active when included from pre-boot environment: */ +/* + * Some architectures want to ensure there is no local data in their + * pre-boot environment, so that data can arbitarily relocated (via + * GOT references). This is achieved by defining STATIC_RW_DATA to + * be null. + */ +#ifndef STATIC_RW_DATA +#define STATIC_RW_DATA static +#endif + /* A trivial malloc implementation, adapted from * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994 */ -static unsigned long malloc_ptr; -static int malloc_count; +STATIC_RW_DATA unsigned long malloc_ptr; +STATIC_RW_DATA int malloc_count; static void *malloc(int size) { |