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| author |   Yinghai Lu <yhlu.kernel@gmail.com> | 2008-06-28 17:49:59 -0700 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-07-08 13:16:07 +0200 |
| commit | b4df32f4aeef8794d0135fc8dc250acb44cfee60 (patch) | |
| tree | 357d504a9cf6f3beb544b3ad36671e3052d9c7ed /arch/x86/kernel/e820.c | |
| parent | x86: fix init_memory_mapping over boundary v3 (diff) | |
| download | linux-dev-b4df32f4aeef8794d0135fc8dc250acb44cfee60.tar.xz linux-dev-b4df32f4aeef8794d0135fc8dc250acb44cfee60.zip | |
x86: fix warning in e820_reserve_resources with 32bit
when 64bit resource is not enabled, we get:
arch/x86/kernel/e820.c: In function ‘e820_reserve_resources’:
arch/x86/kernel/e820.c:1217: warning: comparison is always false due to limited range of data type
because res->start/end is resource_t aka u32. it will overflow.
fix it with temp end of u64
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/e820.c')
| -rw-r--r-- | arch/x86/kernel/e820.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index fa77cb4185c3..ba5ac880ea1e 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -1202,6 +1202,7 @@ void __init e820_reserve_resources(void) { int i; struct resource *res; + u64 end; res = alloc_bootmem_low(sizeof(struct resource) * e820.nr_map); for (i = 0; i < e820.nr_map; i++) { @@ -1211,14 +1212,16 @@ void __init e820_reserve_resources(void) case E820_NVS: res->name = "ACPI Non-volatile Storage"; break; default: res->name = "reserved"; } - res->start = e820.map[i].addr; - res->end = res->start + e820.map[i].size - 1; + end = e820.map[i].addr + e820.map[i].size - 1; #ifndef CONFIG_RESOURCES_64BIT - if (res->end > 0x100000000ULL) { + if (end > 0x100000000ULL) { res++; continue; } #endif + res->start = e820.map[i].addr; + res->end = end; + res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; insert_resource(&iomem_resource, res); res++; |