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vmalloc: add un/map_kernel_range_noflush()

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Impact: two more public map/unmap functions

Implement map_kernel_range_noflush() and unmap_kernel_range_noflush().
These functions respectively map and unmap address range in kernel VM
area but doesn't do any vcache or tlb flushing.  These will be used by
new percpu allocator.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
This commit is contained in:
Tejun Heo 2009-02-20 16:29:08 +09:00
parent f0aa661790
commit 8fc4898500
2 changed files with 67 additions and 3 deletions
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3
include/linux/vmalloc.h
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@ -91,6 +91,9 @@ extern struct vm_struct *remove_vm_area(const void *addr);
extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
struct page ***pages);
extern int map_kernel_range_noflush(unsigned long start, unsigned long size,
pgprot_t prot, struct page **pages);
extern void unmap_kernel_range_noflush(unsigned long addr, unsigned long size);
extern void unmap_kernel_range(unsigned long addr, unsigned long size);
/* Allocate/destroy a 'vmalloc' VM area. */