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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2009-11-10 05:46:17 -0500
committerIngo Molnar <mingo@elte.hu>2009-11-10 06:31:43 -0500
commit9f993ac3f708b661207ed7de521f245586217a68 (patch)
treef9565a41efe0cc2dfde6d84c8a6bdf310799ffea /include/linux
parent9d5ce73a64be2be8112147a3e0b551ad9cd1247b (diff)
bootmem: Add free_bootmem_late()
Add a new function for freeing bootmem after the bootmem allocator has been released and the unreserved pages given to the page allocator. This allows us to reserve bootmem and then release it if we later discover it was not needed. ( This new API will be used by the swiotlb code to recover a significant amount of RAM (64MB). ) Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: chrisw@sous-sol.org Cc: dwmw2@infradead.org Cc: joerg.roedel@amd.com Cc: muli@il.ibm.com Cc: hannes@cmpxchg.org Cc: tj@kernel.org Cc: akpm@linux-foundation.org Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1257849980-22640-7-git-send-email-fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/bootmem.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h
index dd97fb8408a8..b10ec49ee2dd 100644
--- a/include/linux/bootmem.h
+++ b/include/linux/bootmem.h
@@ -53,6 +53,7 @@ extern void free_bootmem_node(pg_data_t *pgdat,
53 unsigned long addr, 53 unsigned long addr,
54 unsigned long size); 54 unsigned long size);
55extern void free_bootmem(unsigned long addr, unsigned long size); 55extern void free_bootmem(unsigned long addr, unsigned long size);
56extern void free_bootmem_late(unsigned long addr, unsigned long size);
56 57
57/* 58/*
58 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE, 59 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,