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Date: Wed, 22 Nov 2017 02:11:05 +0000 From: Ben Hutchings <ben@...adent.org.uk> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org CC: akpm@...ux-foundation.org, "Rui Teng" <rui.teng@...ux.vnet.ibm.com>, "Anshuman Khandual" <khandual@...ux.vnet.ibm.com>, "Michael Ellerman" <mpe@...erman.id.au> Subject: [PATCH 3.2 04/61] powerpc/mm: Fix check of multiple 16G pages from device tree 3.2.96-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Rui Teng <rui.teng@...ux.vnet.ibm.com> commit 23493c121912a39f0262e0dbeb236e1d39efa4d5 upstream. The offset of hugepage block will not be 16G, if the expected page is more than one. Calculate the totol size instead of the hardcode value. Fixes: 4792adbac9eb ("powerpc: Don't use a 16G page if beyond mem= limits") Signed-off-by: Rui Teng <rui.teng@...ux.vnet.ibm.com> Tested-by: Anshuman Khandual <khandual@...ux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@...erman.id.au> Signed-off-by: Ben Hutchings <ben@...adent.org.uk> --- arch/powerpc/mm/hash_utils_64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -383,7 +383,7 @@ static int __init htab_dt_scan_hugepage_ printk(KERN_INFO "Huge page(16GB) memory: " "addr = 0x%lX size = 0x%lX pages = %d\n", phys_addr, block_size, expected_pages); - if (phys_addr + (16 * GB) <= memblock_end_of_DRAM()) { + if (phys_addr + block_size * expected_pages <= memblock_end_of_DRAM()) { memblock_reserve(phys_addr, block_size * expected_pages); add_gpage(phys_addr, block_size, expected_pages); }
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