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| author | Cyril Chemparathy <cyril@ti.com> | 2012-07-20 13:16:41 -0400 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2013-05-30 16:02:30 +0100 |
| commit | 28d4bf7a2929c5e525171d249e12662e21130ec3 (patch) | |
| tree | 0d603e2c33ce17862101aa0c7e3e7a4c6c4075da /arch/arm/mm/mmu.c | |
| parent | adf2e9fda34c1cfff2ee4e47078b1e142adb2c30 (diff) | |
| download | linux-28d4bf7a2929c5e525171d249e12662e21130ec3.tar.gz linux-28d4bf7a2929c5e525171d249e12662e21130ec3.tar.bz2 linux-28d4bf7a2929c5e525171d249e12662e21130ec3.zip | |
ARM: mm: clean up membank size limit checks
This patch cleans up the highmem sanity check code by simplifying the range
checks with a pre-calculated size_limit. This patch should otherwise have no
functional impact on behavior.
This patch also removes a redundant (bank->start < vmalloc_limit) check, since
this is already covered by the !highmem condition.
Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Subash Patel <subash.rp@samsung.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm/mm/mmu.c')
| -rw-r--r-- | arch/arm/mm/mmu.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index ae249d1ab1d3..280f91d02de2 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -992,10 +992,15 @@ void __init sanity_check_meminfo(void) for (i = 0, j = 0; i < meminfo.nr_banks; i++) { struct membank *bank = &meminfo.bank[j]; + phys_addr_t size_limit; + *bank = meminfo.bank[i]; + size_limit = bank->size; if (bank->start >= vmalloc_limit) highmem = 1; + else + size_limit = vmalloc_limit - bank->start; bank->highmem = highmem; @@ -1004,8 +1009,7 @@ void __init sanity_check_meminfo(void) * Split those memory banks which are partially overlapping * the vmalloc area greatly simplifying things later. */ - if (!highmem && bank->start < vmalloc_limit && - bank->size > vmalloc_limit - bank->start) { + if (!highmem && bank->size > size_limit) { if (meminfo.nr_banks >= NR_BANKS) { printk(KERN_CRIT "NR_BANKS too low, " "ignoring high memory\n"); @@ -1014,12 +1018,12 @@ void __init sanity_check_meminfo(void) (meminfo.nr_banks - i) * sizeof(*bank)); meminfo.nr_banks++; i++; - bank[1].size -= vmalloc_limit - bank->start; + bank[1].size -= size_limit; bank[1].start = vmalloc_limit; bank[1].highmem = highmem = 1; j++; } - bank->size = vmalloc_limit - bank->start; + bank->size = size_limit; } #else /* @@ -1037,14 +1041,13 @@ void __init sanity_check_meminfo(void) * Check whether this memory bank would partially overlap * the vmalloc area. */ - if (bank->start + bank->size > vmalloc_limit) - unsigned long newsize = vmalloc_limit - bank->start; + if (bank->size > size_limit) { printk(KERN_NOTICE "Truncating RAM at %.8llx-%.8llx " "to -%.8llx (vmalloc region overlap).\n", (unsigned long long)bank->start, (unsigned long long)bank->start + bank->size - 1, - (unsigned long long)bank->start + newsize - 1); - bank->size = newsize; + (unsigned long long)bank->start + size_limit - 1); + bank->size = size_limit; } #endif if (!bank->highmem && bank->start + bank->size > arm_lowmem_limit) |