memory-hotplug: remove memmap of sparse-vmemmap (0197518c) · Commits · 戴 / test

Introduce a new API vmemmap_free() to free and remove vmemmap pagetables. Since pagetable implements are different, each architecture has to provide its own version of vmemmap_free(), just like vmemmap_populate(). Note: vmemmap_free() is not implemented for ia64, ppc, s390, and sparc. [mhocko@suse.cz: fix implicit declaration of remove_pagetable] Signed-off-by:

Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Signed-off-by:

Jianguo Wu <wujianguo@huawei.com> Signed-off-by:

Wen Congyang <wency@cn.fujitsu.com> Signed-off-by:

Tang Chen <tangchen@cn.fujitsu.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Jiang Liu <jiang.liu@huawei.com> Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Wu Jianguo <wujianguo@huawei.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by:

Michal Hocko <mhocko@suse.cz> Signed-off-by:

Andrew Morton <akpm@linux-foundation.org> Signed-off-by:

Linus Torvalds <torvalds@linux-foundation.org>

arch/arm64/mm/mmu.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -434,4 +434,7 @@ int __meminit vmemmap_populate(struct page *start_page,
		return 0;
		}
		#endif /* CONFIG_ARM64_64K_PAGES */
		void vmemmap_free(struct page *memmap, unsigned long nr_pages)
		{
		}
		#endif /* CONFIG_SPARSEMEM_VMEMMAP */

arch/ia64/mm/discontig.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -823,4 +823,7 @@ int __meminit vmemmap_populate(struct page *start_page,
		return vmemmap_populate_basepages(start_page, size, node);
		}

		void vmemmap_free(struct page *memmap, unsigned long nr_pages)
		{
		}
		#endif

arch/powerpc/mm/init_64.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -298,5 +298,9 @@ int __meminit vmemmap_populate(struct page *start_page,
		return 0;
		}

		void vmemmap_free(struct page *memmap, unsigned long nr_pages)
		{
		}

		#endif /* CONFIG_SPARSEMEM_VMEMMAP */

arch/s390/mm/vmem.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -268,6 +268,10 @@ out:
		return ret;
		}

		void vmemmap_free(struct page *memmap, unsigned long nr_pages)
		{
		}

		/*
		* Add memory segment to the segment list if it doesn't overlap with
		* an already present segment.

arch/sparc/mm/init_64.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -2236,6 +2236,10 @@ void __meminit vmemmap_populate_print_last(void)
		}
		}

		void vmemmap_free(struct page *memmap, unsigned long nr_pages)
		{
		}

		#endif /* CONFIG_SPARSEMEM_VMEMMAP */

		static void prot_init_common(unsigned long page_none,

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