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Thu, 10 Jan 2019 11:07:41 -0800 (PST) Subject: Re: [PATCH] ARM: mm: initialize pfn limits with find_limits() To: Russell King References: <1545954447-22513-1-git-send-email-opendmb@gmail.com> From: Doug Berger Openpgp: preference=signencrypt Autocrypt: addr=opendmb@gmail.com; prefer-encrypt=mutual; keydata= xsBNBFWUMnYBCADCqDWlxLrPaGxwJpK/JHR+3Lar1S3M3K98bCw5GjIKFmnrdW4pXlm1Hdk5 vspF6aQKcjmgLt3oNtaJ8xTR/q9URQ1DrKX/7CgTwPe2dQdI7gNSAE2bbxo7/2umYBm/B7h2 b0PMWgI0vGybu6UY1e8iGOBWs3haZK2M0eg2rPkdm2d6jkhYjD4w2tsbT08IBX/rA40uoo2B DHijLtRSYuNTY0pwfOrJ7BYeM0U82CRGBpqHFrj/o1ZFMPxLXkUT5V1GyDiY7I3vAuzo/prY m4sfbV6SHxJlreotbFufaWcYmRhY2e/bhIqsGjeHnALpNf1AE2r/KEhx390l2c+PrkrNABEB AAHNJkRvdWcgQmVyZ2VyIDxkb3VnLmJlcmdlckBicm9hZGNvbS5jb20+wsEHBBABAgCxBQJa sDPxFwoAAb9Iy/59LfFRBZrQ2vI+6hEaOwDdIBQAAAAAABYAAWtleS11c2FnZS1tYXNrQHBn cC5jb22OMBSAAAAAACAAB3ByZWZlcnJlZC1lbWFpbC1lbmNvZGluZ0BwZ3AuY29tcGdwbWlt ZQgLCQgHAwIBCgIZAQUXgAAAABkYbGRhcDovL2tleXMuYnJvYWRjb20uY29tBRsDAAAAAxYC AQUeAQAAAAQVCAkKAAoJEEv0cxXPMIiXDXMH/Aj4wrSvJTwDDz/pb4GQaiQrI1LSVG7vE+Yy IbLer+wB55nLQhLQbYVuCgH2XmccMxNm8jmDO4EJi60ji6x5GgBzHtHGsbM14l1mN52ONCjy 2QiADohikzPjbygTBvtE7y1YK/WgGyau4CSCWUqybE/vFvEf3yNATBh+P7fhQUqKvMZsqVhO x3YIHs7rz8t4mo2Ttm8dxzGsVaJdo/Z7e9prNHKkRhArH5fi8GMp8OO5XCWGYrEPkZcwC4DC dBY5J8zRpGZjLlBa0WSv7wKKBjNvOzkbKeincsypBF6SqYVLxFoegaBrLqxzIHPsG7YurZxE i7UH1vG/1zEt8UPgggTOwE0EVZQydwEIAM90iYKjEH8SniKcOWDCUC2jF5CopHPhwVGgTWhS vvJsm8ZK7HOdq/OmA6BcwpVZiLU4jQh9d7y9JR1eSehX0dadDHld3+ERRH1/rzH+0XCK4JgP FGzw54oUVmoA9zma9DfPLB/Erp//6LzmmUipKKJC1896gN6ygVO9VHgqEXZJWcuGEEqTixm7 kgaCb+HkitO7uy1XZarzL3l63qvy6s5rNqzJsoXE/vG/LWK5xqxU/FxSPZqFeWbX5kQN5XeJ F+I13twBRA84G+3HqOwlZ7yhYpBoQD+QFjj4LdUS9pBpedJ2iv4t7fmw2AGXVK7BRPs92gyE eINAQp3QTMenqvcAEQEAAcLBgQQYAQIBKwUCVZQyeAUbDAAAAMBdIAQZAQgABgUCVZQydwAK CRCmyye0zhoEDXXVCACjD34z8fRasq398eCHzh1RCRI8vRW1hKY+Ur8ET7gDswto369A3PYS 38hK4Na3PQJ0kjB12p7EVA1rpYz/lpBCDMp6E2PyJ7ZyTgkYGHJvHfrj06pSPVP5EGDLIVOV F5RGUdA/rS1crcTmQ5r1RYye4wQu6z4pc4+IUNNF5K38iepMT/Z+F+oDTJiysWVrhpC2dila 6VvTKipK1k75dvVkyT2u5ijGIqrKs2iwUJqr8RPUUYpZlqKLP+kiR+p+YI16zqb1OfBf5I6H F20s6kKSk145XoDAV9+h05X0NuG0W2q/eBcta+TChiV3i8/44C8vn4YBJxbpj2IxyJmGyq2J AAoJEEv0cxXPMIiXTeYH/AiKCOPHtvuVfW+mJbzHjghjGo3L1KxyRoHRfkqR6HPeW0C1fnDC xTuf+FHT8T/DRZyVqHqA/+jMSmumeUo6lEvJN4ZPNZnN3RUId8lo++MTXvtUgp/+1GBrJz0D /a73q4vHrm62qEWTIC3tV3c8oxvE7FqnpgGu/5HDG7t1XR3uzf43aANgRhe/v2bo3TvPVAq6 K5B9EzoJonGc2mcDfeBmJpuvZbG4llhAbwTi2yyBFgM0tMRv/z8bMWfAq9Lrc2OIL24Pu5aw XfVsGdR1PerwUgHlCgFeWDMbxZWQk0tjt8NGP5cTUee4hT0z8a0EGIzUg/PjUnTrCKRjQmfc YVs= Message-ID: Date: Thu, 10 Jan 2019 11:07:36 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: <1545954447-22513-1-git-send-email-opendmb@gmail.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190110_110743_544957_C0EDDE3A X-CRM114-Status: GOOD ( 22.72 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Nicolas Pitre , Michal Hocko , Catalin Marinas , linux-kernel@vger.kernel.org, "Steven Rostedt \(VMware\)" , Jinbum Park , Mike Rapoport , Andrew Morton , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 12/27/18 3:47 PM, Doug Berger wrote: > The max_low_pfn value must be set before sparse_init() is called to > keep the early memblock allocations and frees balanced for kmemleak > initialization when sparsemem is enabled. > > This commit accomplishes that by replacing the local variables min, > max_low, and max_high with the global limit variables min_low_pfn, > max_low_pfn, and max_pfn respectively in bootmem_init(). The global > variables are initialized directly by find_limits() and used in the > remainder of the function. > > Fixes: 9099daed9c69 ("mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping") > Signed-off-by: Doug Berger > --- > arch/arm/mm/init.c | 20 ++++---------------- > 1 file changed, 4 insertions(+), 16 deletions(-) > > diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c > index 32e4845af2b6..98a733f3a5b9 100644 > --- a/arch/arm/mm/init.c > +++ b/arch/arm/mm/init.c > @@ -302,15 +302,12 @@ void __init arm_memblock_init(const struct machine_desc *mdesc) > > void __init bootmem_init(void) > { > - unsigned long min, max_low, max_high; > - > memblock_allow_resize(); > - max_low = max_high = 0; > > - find_limits(&min, &max_low, &max_high); > + find_limits(&min_low_pfn, &max_low_pfn, &max_pfn); > > - early_memtest((phys_addr_t)min << PAGE_SHIFT, > - (phys_addr_t)max_low << PAGE_SHIFT); > + early_memtest((phys_addr_t)min_low_pfn << PAGE_SHIFT, > + (phys_addr_t)max_low_pfn << PAGE_SHIFT); > > /* > * Sparsemem tries to allocate bootmem in memory_present(), > @@ -328,16 +325,7 @@ void __init bootmem_init(void) > * the sparse mem_map arrays initialized by sparse_init() > * for memmap_init_zone(), otherwise all PFNs are invalid. > */ > - zone_sizes_init(min, max_low, max_high); > - > - /* > - * This doesn't seem to be used by the Linux memory manager any > - * more, but is used by ll_rw_block. If we can get rid of it, we > - * also get rid of some of the stuff above as well. > - */ > - min_low_pfn = min; > - max_low_pfn = max_low; > - max_pfn = max_high; > + zone_sizes_init(min_low_pfn, max_low_pfn, max_pfn); > } > > /* > Any feedback on this patch? Thanks, Doug _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel