Messages in this thread Patch in this message | | | Date | Tue, 30 Mar 2010 15:54:41 -0700 | From | Greg KH <> | Subject | [003/116] decompress: fix new decompressor for PIC |
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2.6.32-stable review patch. If anyone has any objections, please let us know.
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From: Russell King <rmk@arm.linux.org.uk>
commit 5ceaa2f39bfa73c4398cd01e78f1c3ebde3d3383 upstream.
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> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- include/linux/decompress/mm.h | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-)
--- 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) {
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