From: Arnd Bergmann <[email protected]> The omap lcdc driver has an elaborate mmap_kern function to map the frame buffer into kernel address space as write-combined. This uses functions that are only available on MMU-enabled builds.
It does seem equivalent to ioremap_wc though, so we should be able to just use that instead. This patch is build-tested only, it needs to be run on real hardware before applying. Signed-off-by: Arnd Bergmann <[email protected]> Signed-off-by: Peter Griffin <[email protected]> Cc: Jean-Christophe Plagniol-Villard <[email protected]> Cc: Tomi Valkeinen <[email protected]> Cc: [email protected] Cc: [email protected] --- drivers/video/fbdev/omap/lcdc.c | 28 +++++----------------------- 1 file changed, 5 insertions(+), 23 deletions(-) diff --git a/drivers/video/fbdev/omap/lcdc.c b/drivers/video/fbdev/omap/lcdc.c index b52f625..40e8200 100644 --- a/drivers/video/fbdev/omap/lcdc.c +++ b/drivers/video/fbdev/omap/lcdc.c @@ -613,29 +613,11 @@ static void lcdc_dma_handler(u16 status, void *data) static int mmap_kern(void) { - struct vm_struct *kvma; - struct vm_area_struct vma; - pgprot_t pgprot; - unsigned long vaddr; - - kvma = get_vm_area(lcdc.vram_size, VM_IOREMAP); - if (kvma == NULL) { - dev_err(lcdc.fbdev->dev, "can't get kernel vm area\n"); + void __iomem *vaddr; + + vaddr = ioremap_wc(lcdc.vram_phys, lcdc.vram_size); + if (!vaddr) return -ENOMEM; - } - vma.vm_mm = &init_mm; - - vaddr = (unsigned long)kvma->addr; - vma.vm_start = vaddr; - vma.vm_end = vaddr + lcdc.vram_size; - - pgprot = pgprot_writecombine(pgprot_kernel); - if (io_remap_pfn_range(&vma, vaddr, - lcdc.vram_phys >> PAGE_SHIFT, - lcdc.vram_size, pgprot) < 0) { - dev_err(lcdc.fbdev->dev, "kernel mmap for FB memory failed\n"); - return -EAGAIN; - } lcdc.vram_virt = (void *)vaddr; @@ -644,7 +626,7 @@ static int mmap_kern(void) static void unmap_kern(void) { - vunmap(lcdc.vram_virt); + iounmap(lcdc.vram_virt); } static int alloc_palette_ram(void) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
