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authorIgor Mammedov <imammedo@redhat.com>2015-12-04 16:07:05 +0300
committerIngo Molnar <mingo@kernel.org>2015-12-06 14:46:31 +0300
commit8dd3303001976aa8583bf20f6b93590c74114308 (patch)
tree50e206f228cc3f8cd4958fd1f0025417b2848a9c /include/linux/bootmem.h
parent071ac0c4e8e90d5de05f0779b03ae69ce84820d5 (diff)
downloadlinux-8dd3303001976aa8583bf20f6b93590c74114308.tar.xz
x86/mm: Introduce max_possible_pfn
max_possible_pfn will be used for tracking max possible PFN for memory that isn't present in E820 table and could be hotplugged later. By default max_possible_pfn is initialized with max_pfn, but later it could be updated with highest PFN of hotpluggable memory ranges declared in ACPI SRAT table if any present. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: akataria@vmware.com Cc: fujita.tomonori@lab.ntt.co.jp Cc: konrad.wilk@oracle.com Cc: pbonzini@redhat.com Cc: revers@redhat.com Cc: riel@redhat.com Link: http://lkml.kernel.org/r/1449234426-273049-2-git-send-email-imammedo@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/bootmem.h')
-rw-r--r--include/linux/bootmem.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h
index f589222bfa87..35b22f94d2d2 100644
--- a/include/linux/bootmem.h
+++ b/include/linux/bootmem.h
@@ -19,6 +19,10 @@ extern unsigned long min_low_pfn;
* highest page
*/
extern unsigned long max_pfn;
+/*
+ * highest possible page
+ */
+extern unsigned long long max_possible_pfn;
#ifndef CONFIG_NO_BOOTMEM
/*