Merge branch 'stable/swiotlb-0.9' of git://git.kernel.org/pub/scm/linux/kernel/git...

* 'stable/swiotlb-0.9' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb-2.6:
  swiotlb: Use page alignment for early buffer allocation
  swiotlb: make io_tlb_overflow static

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 34e3082..7c06ee5 100644 (file)
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -70,7 +70,7 @@ static unsigned long io_tlb_nslabs;
  */
 static unsigned long io_tlb_overflow = 32*1024;
 
-void *io_tlb_overflow_buffer;
+static void *io_tlb_overflow_buffer;
 
 /*
  * This is a free list describing the number of free entries available from
@@ -147,16 +147,16 @@ void __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
         * to find contiguous free memory regions of size up to IO_TLB_SEGSIZE
         * between io_tlb_start and io_tlb_end.
         */
-       io_tlb_list = alloc_bootmem(io_tlb_nslabs * sizeof(int));
+       io_tlb_list = alloc_bootmem_pages(PAGE_ALIGN(io_tlb_nslabs * sizeof(int)));
        for (i = 0; i < io_tlb_nslabs; i++)
                io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE);
        io_tlb_index = 0;
-       io_tlb_orig_addr = alloc_bootmem(io_tlb_nslabs * sizeof(phys_addr_t));
+       io_tlb_orig_addr = alloc_bootmem_pages(PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t)));
 
        /*
         * Get the overflow emergency buffer
         */
-       io_tlb_overflow_buffer = alloc_bootmem_low(io_tlb_overflow);
+       io_tlb_overflow_buffer = alloc_bootmem_low_pages(PAGE_ALIGN(io_tlb_overflow));
        if (!io_tlb_overflow_buffer)
                panic("Cannot allocate SWIOTLB overflow buffer!\n");
        if (verbose)
@@ -182,7 +182,7 @@ swiotlb_init_with_default_size(size_t default_size, int verbose)
        /*
         * Get IO TLB memory from the low pages
         */
-       io_tlb_start = alloc_bootmem_low_pages(bytes);
+       io_tlb_start = alloc_bootmem_low_pages(PAGE_ALIGN(bytes));
        if (!io_tlb_start)
                panic("Cannot allocate SWIOTLB buffer");
 
@@ -308,13 +308,13 @@ void __init swiotlb_free(void)
                           get_order(io_tlb_nslabs << IO_TLB_SHIFT));
        } else {
                free_bootmem_late(__pa(io_tlb_overflow_buffer),
-                                 io_tlb_overflow);
+                                 PAGE_ALIGN(io_tlb_overflow));
                free_bootmem_late(__pa(io_tlb_orig_addr),
-                                 io_tlb_nslabs * sizeof(phys_addr_t));
+                                 PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t)));
                free_bootmem_late(__pa(io_tlb_list),
-                                 io_tlb_nslabs * sizeof(int));
+                                 PAGE_ALIGN(io_tlb_nslabs * sizeof(int)));
                free_bootmem_late(__pa(io_tlb_start),
-                                 io_tlb_nslabs << IO_TLB_SHIFT);
+                                 PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT));
        }
 }