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authorDillon Min <dillon.minfei@gmail.com>2021-10-19 09:43:18 +0100
committerMauro Carvalho Chehab <mchehab+huawei@kernel.org>2021-11-15 08:11:31 +0000
commit0a08088f82c2db9cd6bce3258c79a76980c77651 (patch)
tree8c8c593db26d3e6ba29372eb3133b487e2000d28 /include/media
parent68dda3e02522aae867f4d526e44e1a87a6cec52a (diff)
media: v4l2-mem2mem: add v4l2_m2m_get_unmapped_area for no-mmu platform
For platforms without MMU the m2m provides a helper method v4l2_m2m_get_unmapped_area(), The mmap() routines will call this to get a proposed address for the mapping. More detailed information about get_unmapped_area can be found in Documentation/nommu-mmap.txt Signed-off-by: Dillon Min <dillon.minfei@gmail.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'include/media')
-rw-r--r--include/media/v4l2-mem2mem.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/media/v4l2-mem2mem.h b/include/media/v4l2-mem2mem.h
index 5a91b548ecc0..fdbd5257e020 100644
--- a/include/media/v4l2-mem2mem.h
+++ b/include/media/v4l2-mem2mem.h
@@ -495,6 +495,11 @@ __poll_t v4l2_m2m_poll(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
int v4l2_m2m_mmap(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
struct vm_area_struct *vma);
+#ifndef CONFIG_MMU
+unsigned long v4l2_m2m_get_unmapped_area(struct file *file, unsigned long addr,
+ unsigned long len, unsigned long pgoff,
+ unsigned long flags);
+#endif
/**
* v4l2_m2m_init() - initialize per-driver m2m data
*