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authorTang Chen <tangchen@cn.fujitsu.com>2013-02-22 16:33:08 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-23 17:50:12 -0800
commit0197518cd3672029618a16a57597946a094ac7a8 (patch)
tree64785feea48812285b31d690a167c3c488c8017a /arch
parentbbcab8789d4a5b942773aa7496794ceebe2d3f78 (diff)
memory-hotplug: remove memmap of sparse-vmemmap
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm64/mm/mmu.c3
-rw-r--r--arch/ia64/mm/discontig.c3
-rw-r--r--arch/powerpc/mm/init_64.c4
-rw-r--r--arch/s390/mm/vmem.c4
-rw-r--r--arch/sparc/mm/init_64.c4
-rw-r--r--arch/x86/mm/init_64.c8
6 files changed, 26 insertions, 0 deletions
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index f4dd585898c..224b44ab534 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -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 */
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index 731bf84094b..652fee09792 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -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
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index 42bf082f012..7e2246fb2f3 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -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 */
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index 79699f46a44..e21aaf4f5cb 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -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.
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index 59c6fcfdc78..1588d33d549 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -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,
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 4e58b83e6b2..474e28f1081 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -1011,6 +1011,14 @@ remove_pagetable(unsigned long start, unsigned long end, bool direct)
flush_tlb_all();
}
+void __ref vmemmap_free(struct page *memmap, unsigned long nr_pages)
+{
+ unsigned long start = (unsigned long)memmap;
+ unsigned long end = (unsigned long)(memmap + nr_pages);
+
+ remove_pagetable(start, end, false);
+}
+
static void __meminit
kernel_physical_mapping_remove(unsigned long start, unsigned long end)
{