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| author | James Morris <james.l.morris@oracle.com> | 2014-01-06 15:23:01 +0400 |
|---|---|---|
| committer | James Morris <james.l.morris@oracle.com> | 2014-01-06 15:23:01 +0400 |
| commit | 38fd2c202a3d82bc12430bce5789fa2c2a406f71 (patch) | |
| tree | a73513dbb015155f5236b391709b9083916b3136 /arch/arm/mm/mmap.c | |
| parent | dcf4e392867bf98d50ad108ed7c2bfb941e8c33d (diff) | |
| parent | d6e0a2dd12f4067a5bcefb8bbd8ddbeff800afbc (diff) | |
| download | linux-38fd2c202a3d82bc12430bce5789fa2c2a406f71.tar.xz | |
Merge to v3.13-rc7 for prerequisite changes in the Xen code for TPM
Diffstat (limited to 'arch/arm/mm/mmap.c')
| -rw-r--r-- | arch/arm/mm/mmap.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/arch/arm/mm/mmap.c b/arch/arm/mm/mmap.c index 0c6356255fe3..5e85ed371364 100644 --- a/arch/arm/mm/mmap.c +++ b/arch/arm/mm/mmap.c @@ -146,7 +146,7 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, info.flags = VM_UNMAPPED_AREA_TOPDOWN; info.length = len; - info.low_limit = PAGE_SIZE; + info.low_limit = FIRST_USER_ADDRESS; info.high_limit = mm->mmap_base; info.align_mask = do_align ? (PAGE_MASK & (SHMLBA - 1)) : 0; info.align_offset = pgoff << PAGE_SHIFT; @@ -202,13 +202,11 @@ int valid_phys_addr_range(phys_addr_t addr, size_t size) } /* - * We don't use supersection mappings for mmap() on /dev/mem, which - * means that we can't map the memory area above the 4G barrier into - * userspace. + * Do not allow /dev/mem mappings beyond the supported physical range. */ int valid_mmap_phys_addr_range(unsigned long pfn, size_t size) { - return !(pfn + (size >> PAGE_SHIFT) > 0x00100000); + return (pfn + (size >> PAGE_SHIFT)) <= (1 + (PHYS_MASK >> PAGE_SHIFT)); } #ifdef CONFIG_STRICT_DEVMEM |