diff options
Diffstat (limited to 'arch/x86/kernel/e820.c')
| -rw-r--r-- | arch/x86/kernel/e820.c | 32 |
1 files changed, 25 insertions, 7 deletions
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index 508bec1cee2..3cf6681ac80 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -421,7 +421,7 @@ static u64 __init e820_update_range_map(struct e820map *e820x, u64 start, u64 size, unsigned old_type, unsigned new_type) { - int i; + unsigned int i, x; u64 real_updated_size = 0; BUG_ON(old_type == new_type); @@ -429,7 +429,7 @@ static u64 __init e820_update_range_map(struct e820map *e820x, u64 start, if (size > (ULLONG_MAX - start)) size = ULLONG_MAX - start; - for (i = 0; i < e820.nr_map; i++) { + for (i = 0; i < e820x->nr_map; i++) { struct e820entry *ei = &e820x->map[i]; u64 final_start, final_end; if (ei->type != old_type) @@ -446,14 +446,23 @@ static u64 __init e820_update_range_map(struct e820map *e820x, u64 start, final_end = min(start + size, ei->addr + ei->size); if (final_start >= final_end) continue; - e820_add_region(final_start, final_end - final_start, - new_type); + + x = e820x->nr_map; + if (x == ARRAY_SIZE(e820x->map)) { + printk(KERN_ERR "Too many memory map entries!\n"); + break; + } + e820x->map[x].addr = final_start; + e820x->map[x].size = final_end - final_start; + e820x->map[x].type = new_type; + e820x->nr_map++; + real_updated_size += final_end - final_start; - ei->size -= final_end - final_start; if (ei->addr < final_start) continue; ei->addr = final_end; + ei->size -= final_end - final_start; } return real_updated_size; } @@ -1020,8 +1029,8 @@ u64 __init find_e820_area_size(u64 start, u64 *sizep, u64 align) continue; return addr; } - return -1UL; + return -1ULL; } /* @@ -1034,13 +1043,22 @@ u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align) u64 start; start = startt; - while (size < sizet) + while (size < sizet && (start + 1)) start = find_e820_area_size(start, &size, align); if (size < sizet) return 0; +#ifdef CONFIG_X86_32 + if (start >= MAXMEM) + return 0; + if (start + size > MAXMEM) + size = MAXMEM - start; +#endif + addr = round_down(start + size - sizet, align); + if (addr < start) + return 0; e820_update_range(addr, sizet, E820_RAM, E820_RESERVED); e820_update_range_saved(addr, sizet, E820_RAM, E820_RESERVED); printk(KERN_INFO "update e820 for early_reserve_e820\n"); |