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authorRussell King <rmk@arm.linux.org.uk>2010-03-11 02:23:53 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-13 02:52:44 +0300
commit5ceaa2f39bfa73c4398cd01e78f1c3ebde3d3383 (patch)
treea33b0a472d42c1b744eaeb0efff2e9b6a234e4d4 /include/linux/decompress
parent8c1840f15feecb6961f480cad1a7a8e53a3f2ba6 (diff)
downloadlinux-5ceaa2f39bfa73c4398cd01e78f1c3ebde3d3383.tar.xz
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.h14
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)
{