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| author | David Vrabel <david.vrabel@citrix.com> | 2011-09-29 16:53:32 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-11-16 12:13:08 -0500 |
| commit | cd12909cb576d37311fe35868780e82d5007d0c8 (patch) | |
| tree | 70ec60af4feb32087f542a838fe4dce8717f0cd6 /mm/nommu.c | |
| parent | 1ea6b8f48918282bdca0b32a34095504ee65bab5 (diff) | |
| download | lwn-cd12909cb576d37311fe35868780e82d5007d0c8.tar.gz lwn-cd12909cb576d37311fe35868780e82d5007d0c8.zip | |
xen: map foreign pages for shared rings by updating the PTEs directly
When mapping a foreign page with xenbus_map_ring_valloc() with the
GNTTABOP_map_grant_ref hypercall, set the GNTMAP_contains_pte flag and
pass a pointer to the PTE (in init_mm).
After the page is mapped, the usual fault mechanism can be used to
update additional MMs. This allows the vmalloc_sync_all() to be
removed from alloc_vm_area().
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
[v1: Squashed fix by Michal for no-mmu case]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'mm/nommu.c')
| -rw-r--r-- | mm/nommu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/nommu.c b/mm/nommu.c index 73419c55eda6..b982290fd962 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -454,7 +454,7 @@ void __attribute__((weak)) vmalloc_sync_all(void) * between processes, it syncs the pagetable across all * processes. */ -struct vm_struct *alloc_vm_area(size_t size) +struct vm_struct *alloc_vm_area(size_t size, pte_t **ptes) { BUG(); return NULL; |