If HAVE_ARCH_FB_UNMAPPED_AREA is set and get_fb_unmapped_area
function not defined in platform architecture let use a default function.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxx>
---
drivers/video/fbdev/core/fbmem.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 76c1ad9..54488ee 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1492,6 +1492,21 @@ static long fb_compat_ioctl(struct file *file, unsigned int cmd,
return 0;
}
+#if defined(HAVE_ARCH_FB_UNMAPPED_AREA) && !defined(get_fb_unmapped_area)
+unsigned long get_fb_unmapped_area(struct file *filp,
+ unsigned long addr, unsigned long len,
+ unsigned long pgoff, unsigned long flags)
+{
+ struct fb_info * const info = filp->private_data;
+ unsigned long fb_size = PAGE_ALIGN(info->fix.smem_len);
+
+ if (pgoff > fb_size || len > fb_size - pgoff)
+ return -EINVAL;
+
+ return (unsigned long)info->screen_base + pgoff;
+}
+#endif
+
static const struct file_operations fb_fops = {
.owner = THIS_MODULE,
.read = fb_read,
--
1.9.1
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