x86_32 CONFIG_HIGHMEM64G with 5GB RAM hung when booting, after issuing
some "request_module: runaway loop modprobe binfmt-0000" messages in
trying to exec /sbin/init.
The binprm buf doesn't see the right ".ELF" header because sg_phys()
is providing the wrong physical addresses for high pages: a 32-bit
unsigned long is too small in this case, we need to use dma_addr_t.
Signed-off-by: Hugh Dickins <[email protected]>
---
Whether this is a complete patch, suitable for all architectures,
I'm not sure: it builds, boots and runs correctly on the x86_32 box
in question, but you'll be a lot wiser than me about using dma_addr_t
for everyone. (Seems a bit of a shame to include <asm/types.h> here,
when I think all arches already get to include it one way or another,
typically via asm/scatterlist.h; but I guess it's safest to repeat it.)
include/linux/scatterlist.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- 2.6.24-rc1/include/linux/scatterlist.h 2007-10-24 12:42:16.000000000 +0100
+++ linux/include/linux/scatterlist.h 2007-10-24 19:17:13.000000000 +0100
@@ -1,6 +1,7 @@
#ifndef _LINUX_SCATTERLIST_H
#define _LINUX_SCATTERLIST_H
+#include <asm/types.h>
#include <asm/scatterlist.h>
#include <linux/mm.h>
#include <linux/string.h>
@@ -237,7 +238,7 @@ static inline void sg_init_table(struct
* on the sg page.
*
**/
-static inline unsigned long sg_phys(struct scatterlist *sg)
+static inline dma_addr_t sg_phys(struct scatterlist *sg)
{
return page_to_phys(sg_page(sg)) + sg->offset;
}
-
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