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| author | Michael Ellerman <michael@ellerman.id.au> | 2008-02-29 18:33:24 +1100 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2008-03-03 08:03:15 +0100 |
| commit | edf441fb80f9d7a962c298e8da94c8c64802fffa (patch) | |
| tree | e7b6708297a07c6239b68ec36dafcd4485522492 /arch/powerpc/platforms/cell/iommu.c | |
| parent | 08e024272e529076663e5b4dc8eeecd4131f8a48 (diff) | |
| download | linux-edf441fb80f9d7a962c298e8da94c8c64802fffa.tar.gz linux-edf441fb80f9d7a962c298e8da94c8c64802fffa.tar.bz2 linux-edf441fb80f9d7a962c298e8da94c8c64802fffa.zip | |
[POWERPC] Move allocation of cell IOMMU pad page
There's no need to allocate the pad page unless we're going to actually
use it - so move the allocation to where we know we're going to use it.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/powerpc/platforms/cell/iommu.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/iommu.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c index 555d264ad568..8e57e1af3785 100644 --- a/arch/powerpc/platforms/cell/iommu.c +++ b/arch/powerpc/platforms/cell/iommu.c @@ -344,12 +344,6 @@ static void cell_iommu_setup_page_tables(struct cbe_iommu *iommu, iommu->ptab = page_address(page); memset(iommu->ptab, 0, ptab_size); - /* allocate a bogus page for the end of each mapping */ - page = alloc_pages_node(iommu->nid, GFP_KERNEL, 0); - BUG_ON(!page); - iommu->pad_page = page_address(page); - clear_page(iommu->pad_page); - /* number of pages needed for a page table */ n_pte_pages = (pages_per_segment * sizeof(unsigned long)) >> IOMMU_PAGE_SHIFT; @@ -463,6 +457,7 @@ cell_iommu_setup_window(struct cbe_iommu *iommu, struct device_node *np, unsigned long pte_offset) { struct iommu_window *window; + struct page *page; u32 ioid; ioid = cell_iommu_get_ioid(np); @@ -501,6 +496,11 @@ cell_iommu_setup_window(struct cbe_iommu *iommu, struct device_node *np, * This code also assumes that we have a window that starts at 0, * which is the case on all spider based blades. */ + page = alloc_pages_node(iommu->nid, GFP_KERNEL, 0); + BUG_ON(!page); + iommu->pad_page = page_address(page); + clear_page(iommu->pad_page); + __set_bit(0, window->table.it_map); tce_build_cell(&window->table, window->table.it_offset, 1, (unsigned long)iommu->pad_page, DMA_TO_DEVICE); |