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authorDavid S. Miller <davem@davemloft.net>2009-11-23 16:38:56 -0800
committerDavid S. Miller <davem@davemloft.net>2009-11-23 16:38:56 -0800
commitbffbc94a4d2c1769c3826fceddd2dbb75e72c80b (patch)
tree3e4cce10f16f57b038ae5fa590c9ac4337385f1e /arch
parent1c9d80ddc60f8ac26344ec3db9830e5f8016c16d (diff)
sparc64: Fix definition of VMEMMAP_SIZE.
This was the cause of various boot failures on V480, V880, etc. systems. Kernel image memory was being overwritten because the vmemmap[] array was being sized to small. So if you had physical memory addresses past a certain point, the early bootup would spam all over variables in the kernel data section. The vmemmap mappings map page structs, not page struct pointers. And that was the key thinko in the macro definition. This was fixable thanks to the help, reports, and tireless patience of Hermann Lauer. Reported-by: Hermann Lauer <Hermann.Lauer@iwr.uni-heidelberg.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch')
-rw-r--r--arch/sparc/mm/init_64.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/sparc/mm/init_64.h b/arch/sparc/mm/init_64.h
index c2f772dbd55..77d1b313e34 100644
--- a/arch/sparc/mm/init_64.h
+++ b/arch/sparc/mm/init_64.h
@@ -45,7 +45,7 @@ extern void free_initmem(void);
#define VMEMMAP_ALIGN(x) (((x)+VMEMMAP_CHUNK-1UL)&VMEMMAP_CHUNK_MASK)
#define VMEMMAP_SIZE ((((1UL << MAX_PHYSADDR_BITS) >> PAGE_SHIFT) * \
- sizeof(struct page *)) >> VMEMMAP_CHUNK_SHIFT)
+ sizeof(struct page)) >> VMEMMAP_CHUNK_SHIFT)
extern unsigned long vmemmap_table[VMEMMAP_SIZE];
#endif