diff options
| author | David S. Miller <davem@davemloft.net> | 2012-04-26 20:00:35 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-04-26 20:00:35 -0700 |
| commit | 8fe5f56c8a203a7a83d1b621c369655d914f3752 (patch) | |
| tree | ec865efb2d577d1e536720a28ae18b10bdbfd973 /arch/arm/kernel/setup.c | |
| parent | df2e7f525d88da992021b589d8a412afc15de36c (diff) | |
| parent | 82b769063598d01a8b24abf250a53f8b437e09f1 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux
Conflicts:
arch/sparc/kernel/leon_smp.c
Merge mainline to get the nobootmem.c bug fix, for the sake
of the sparc64 NO_BOOTMEM conversion.
Resolve a small include line conflict in leon_smp.c
Signed-off-by: David S. Miller <davem@davemloft.net>
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 |