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decompress: fix new decompressor for PIC

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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>
This commit is contained in:
Russell King 2010-03-10 15:23:53 -08:00 • committed by Linus Torvalds
parent 8c1840f15f
commit 5ceaa2f39b
1 changed files with 12 additions and 2 deletions
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14
include/linux/decompress/mm.h
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@ -14,11 +14,21 @@
/* Code active when included from pre-boot environment: */ /* 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 /* A trivial malloc implementation, adapted from
* malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994 * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
*/ */
static unsigned long malloc_ptr; STATIC_RW_DATA unsigned long malloc_ptr;
static int malloc_count; STATIC_RW_DATA int malloc_count;
static void *malloc(int size) static void *malloc(int size)
{ {