From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Rapoport Date: Tue, 28 Jul 2020 05:11:41 +0000 Subject: [PATCH 03/15] arm, xtensa: simplify initialization of high memory pages Message-Id: <20200728051153.1590-4-rppt@kernel.org> List-Id: References: <20200728051153.1590-1-rppt@kernel.org> In-Reply-To: <20200728051153.1590-1-rppt@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Andrew Morton Cc: linux-sh@vger.kernel.org, Peter Zijlstra , Benjamin Herrenschmidt , Dave Hansen , linux-mips@vger.kernel.org, Max Filippov , Paul Mackerras , sparclinux@vger.kernel.org, linux-riscv@lists.infradead.org, Will Deacon , Stafford Horne , Marek Szyprowski , linux-s390@vger.kernel.org, linux-c6x-dev@linux-c6x.org, Yoshinori Sato , Michael Ellerman , x86@kernel.org, Russell King , Mike Rapoport , clang-built-linux@googlegroups.com, Ingo Molnar , Catalin Marinas , uclinux-h8-devel@lists.sourceforge.jp, linux-xtensa@linux-xtensa.org, openrisc@lists.librecores.org, Borislav Petkov , Andy Lutomirski , Paul Walmsley , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Michal Simek , linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Palmer Dabbelt , Christoph Hellwig , Mike Rapoport From: Mike Rapoport The function free_highpages() in both arm and xtensa essentially open-code for_each_free_mem_range() loop to detect high memory pages that were not reserved and that should be initialized and passed to the buddy allocator. Replace open-coded implementation of for_each_free_mem_range() with usage of memblock API to simplify the code. Signed-off-by: Mike Rapoport --- arch/arm/mm/init.c | 48 +++++++------------------------------ arch/xtensa/mm/init.c | 55 ++++++++----------------------------------- 2 files changed, 18 insertions(+), 85 deletions(-) diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index 01e18e43b174..626af348eb8f 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -352,61 +352,29 @@ static void __init free_unused_memmap(void) #endif } -#ifdef CONFIG_HIGHMEM -static inline void free_area_high(unsigned long pfn, unsigned long end) -{ - for (; pfn < end; pfn++) - free_highmem_page(pfn_to_page(pfn)); -} -#endif - static void __init free_highpages(void) { #ifdef CONFIG_HIGHMEM unsigned long max_low = max_low_pfn; - struct memblock_region *mem, *res; + phys_addr_t range_start, range_end; + u64 i; /* set highmem page free */ - for_each_memblock(memory, mem) { - unsigned long start = memblock_region_memory_base_pfn(mem); - unsigned long end = memblock_region_memory_end_pfn(mem); + for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, + &range_start, &range_end, NULL) { + unsigned long start = PHYS_PFN(range_start); + unsigned long end = PHYS_PFN(range_end); /* Ignore complete lowmem entries */ if (end <= max_low) continue; - if (memblock_is_nomap(mem)) - continue; - /* Truncate partial highmem entries */ if (start < max_low) start = max_low; - /* Find and exclude any reserved regions */ - for_each_memblock(reserved, res) { - unsigned long res_start, res_end; - - res_start = memblock_region_reserved_base_pfn(res); - res_end = memblock_region_reserved_end_pfn(res); - - if (res_end < start) - continue; - if (res_start < start) - res_start = start; - if (res_start > end) - res_start = end; - if (res_end > end) - res_end = end; - if (res_start != start) - free_area_high(start, res_start); - start = res_end; - if (start = end) - break; - } - - /* And now free anything which remains */ - if (start < end) - free_area_high(start, end); + for (; start < end; start++) + free_highmem_page(pfn_to_page(start)); } #endif } diff --git a/arch/xtensa/mm/init.c b/arch/xtensa/mm/init.c index a05b306cf371..ad9d59d93f39 100644 --- a/arch/xtensa/mm/init.c +++ b/arch/xtensa/mm/init.c @@ -79,67 +79,32 @@ void __init zones_init(void) free_area_init(max_zone_pfn); } -#ifdef CONFIG_HIGHMEM -static void __init free_area_high(unsigned long pfn, unsigned long end) -{ - for (; pfn < end; pfn++) - free_highmem_page(pfn_to_page(pfn)); -} - static void __init free_highpages(void) { +#ifdef CONFIG_HIGHMEM unsigned long max_low = max_low_pfn; - struct memblock_region *mem, *res; + phys_addr_t range_start, range_end; + u64 i; - reset_all_zones_managed_pages(); /* set highmem page free */ - for_each_memblock(memory, mem) { - unsigned long start = memblock_region_memory_base_pfn(mem); - unsigned long end = memblock_region_memory_end_pfn(mem); + for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, + &range_start, &range_end, NULL) { + unsigned long start = PHYS_PFN(range_start); + unsigned long end = PHYS_PFN(range_end); /* Ignore complete lowmem entries */ if (end <= max_low) continue; - if (memblock_is_nomap(mem)) - continue; - /* Truncate partial highmem entries */ if (start < max_low) start = max_low; - /* Find and exclude any reserved regions */ - for_each_memblock(reserved, res) { - unsigned long res_start, res_end; - - res_start = memblock_region_reserved_base_pfn(res); - res_end = memblock_region_reserved_end_pfn(res); - - if (res_end < start) - continue; - if (res_start < start) - res_start = start; - if (res_start > end) - res_start = end; - if (res_end > end) - res_end = end; - if (res_start != start) - free_area_high(start, res_start); - start = res_end; - if (start = end) - break; - } - - /* And now free anything which remains */ - if (start < end) - free_area_high(start, end); + for (; start < end; start++) + free_highmem_page(pfn_to_page(start)); } -} -#else -static void __init free_highpages(void) -{ -} #endif +} /* * Initialize memory pages. -- 2.26.2