From: Magnus Hjorth <[EMAIL PROTECTED]>
This patch (for 2.6.23.1) fixes an unsigned arithmetic bug causing the
kernel to hang when booting with less than 16 MB of memory on ppc4xx.
Signed-off-by: Magnus Hjorth <[EMAIL PROTECTED]>
---
OK, trying to do this by the book now...
--- linux-2.6.23.1/arch/ppc/mm/4xx_mmu.c.orig 2007-10-27 10:14:42.000000000
+0200
+++ linux-2.6.23.1/arch/ppc/mm/4xx_mmu.c 2007-10-27 10:15:34.000000000
+0200
@@ -105,7 +105,7 @@ unsigned long __init mmu_mapin_ram(void)
return s;
}
- while (s <= (total_lowmem - LARGE_PAGE_SIZE_16M)) {
+ while (s + LARGE_PAGE_SIZE_16M <= total_lowmem) {
pmd_t *pmdp;
unsigned long val = p | _PMD_SIZE_16M | _PAGE_HWEXEC |
_PAGE_HWWRITE;
@@ -120,7 +120,7 @@ unsigned long __init mmu_mapin_ram(void)
s += LARGE_PAGE_SIZE_16M;
}
- while (s <= (total_lowmem - LARGE_PAGE_SIZE_4M)) {
+ while (s + LARGE_PAGE_SIZE_4M <= total_lowmem) {
pmd_t *pmdp;
unsigned long val = p | _PMD_SIZE_4M | _PAGE_HWEXEC |
_PAGE_HWWRITE;
_______________________________________________
Linuxppc-embedded mailing list
Linuxppc-embedded@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-embedded
