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[PATCH] ppc64: firmware workaround

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Recent gcc 4.0 testing uncovered a firmware issue.  Some properties are larger
than 31 bytes and due to gcc 4.0s better stack allocation this overflow ran
over non volatile register storage.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Anton Blanchard 2005-05-01 08:58:46 -07:00 committed by Linus Torvalds
parent 4b88e927e8
commit c4005e4f66
1 changed files with 7 additions and 1 deletions
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8
arch/ppc64/kernel/prom_init.c
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@ -1555,6 +1555,12 @@ static void __init scan_dt_build_strings(phandle node, unsigned long *mem_start,
}
}
/*
* The Open Firmware 1275 specification states properties must be 31 bytes or
* less, however not all firmwares obey this. Make it 64 bytes to be safe.
*/
#define MAX_PROPERTY_NAME 64
static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
unsigned long *mem_end)
{
@ -1564,7 +1570,7 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
unsigned long soff;
unsigned char *valp;
unsigned long offset = reloc_offset();
char pname[32];
char pname[MAX_PROPERTY_NAME];
char *path;
path = RELOC(prom_scratch);