[PATCH 5/8] mm: use vm_unmapped_area() in hugetlbfs on ia64 architecture
From: Michel Lespinasse <hidden>
Date: 2013-01-24 01:31:52
Also in:
linux-mm, linuxppc-dev, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
Update the ia64 hugetlb_get_unmapped_area function to make use of vm_unmapped_area() instead of implementing a brute force search. Signed-off-by: Michel Lespinasse <redacted> Acked-by: Rik van Riel <redacted> --- arch/ia64/mm/hugetlbpage.c | 20 +++++++++----------- 1 files changed, 9 insertions(+), 11 deletions(-)
diff --git a/arch/ia64/mm/hugetlbpage.c b/arch/ia64/mm/hugetlbpage.c
index 5ca674b74737..76069c18ee42 100644
--- a/arch/ia64/mm/hugetlbpage.c
+++ b/arch/ia64/mm/hugetlbpage.c@@ -148,7 +148,7 @@ void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) { - struct vm_area_struct *vmm; + struct vm_unmapped_area_info info; if (len > RGN_MAP_LIMIT) return -ENOMEM;
@@ -165,16 +165,14 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, u /* This code assumes that RGN_HPAGE != 0. */ if ((REGION_NUMBER(addr) != RGN_HPAGE) || (addr & (HPAGE_SIZE - 1))) addr = HPAGE_REGION_BASE; - else - addr = ALIGN(addr, HPAGE_SIZE); - for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) { - /* At this point: (!vmm || addr < vmm->vm_end). */ - if (REGION_OFFSET(addr) + len > RGN_MAP_LIMIT) - return -ENOMEM; - if (!vmm || (addr + len) <= vmm->vm_start) - return addr; - addr = ALIGN(vmm->vm_end, HPAGE_SIZE); - } + + info.flags = 0; + info.length = len; + info.low_limit = addr; + info.high_limit = HPAGE_REGION_BASE + RGN_MAP_LIMIT; + info.align_mask = PAGE_MASK & (HPAGE_SIZE - 1); + info.align_offset = 0; + return vm_unmapped_area(&info); } static int __init hugetlb_setup_sz(char *str)
--
1.7.7.3
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