diff options
| author | Ingo Molnar <mingo@kernel.org> | 2012-04-25 08:59:16 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-04-25 08:59:16 +0200 |
| commit | 3dbe927b1eddcbd66da1653168e33122aca84f4e (patch) | |
| tree | 2357f4c55156597b1d07b9ea360b07086cd011e4 /arch/arm/kernel/setup.c | |
| parent | a385ec4f11bdcf81af094c03e2444ee9b7fad2e5 (diff) | |
| parent | 66f75a5d028beaf67c931435fdc3e7823125730c (diff) | |
Merge tag 'v3.4-rc4' into perf/core
Merge v3.4-rc4 - we were on -rc2 before.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm/kernel/setup.c')
| -rw-r--r-- | arch/arm/kernel/setup.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index b91411371ae1..ebfac782593f 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -523,7 +523,21 @@ int __init arm_add_memory(phys_addr_t start, unsigned long size) */ size -= start & ~PAGE_MASK; bank->start = PAGE_ALIGN(start); - bank->size = size & PAGE_MASK; + +#ifndef CONFIG_LPAE + if (bank->start + size < bank->start) { + printk(KERN_CRIT "Truncating memory at 0x%08llx to fit in " + "32-bit physical address space\n", (long long)start); + /* + * To ensure bank->start + bank->size is representable in + * 32 bits, we use ULONG_MAX as the upper limit rather than 4GB. + * This means we lose a page after masking. + */ + size = ULONG_MAX - bank->start; + } +#endif + + bank->size = size & PAGE_MASK; /* * Check whether this memory region has non-zero size or |