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frace docs an mmap minor improvements

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Ciro Santilli
2017-09-27 20:20:56 +01:00
parent 01f6ca24e5
commit f80957cc40
2 changed files with 11 additions and 4 deletions
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10
kernel_module/mmap.c
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@@ -3,10 +3,18 @@ Remember: mmap, like most fops, does not work with debugfs as of 4.9! https://pa
Adapted from:
https://coherentmusings.wordpress.com/2014/06/10/implementing-mmap-for-transferring-data-from-user-space-to-kernel-space/
Related:
- https://stackoverflow.com/questions/10760479/mmap-kernel-buffer-to-user-space/10770582#10770582
- https://stackoverflow.com/questions/1623008/allocating-memory-for-user-space-from-kernel-thread
- https://stackoverflow.com/questions/6967933/mmap-mapping-in-user-space-a-kernel-buffer-allocated-with-kmalloc
- https://github.com/jeremytrimble/ezdma
- https://github.com/simonjhall/dma
- https://github.com/ikwzm/udmabuf
*/
#include <asm/uaccess.h> /* copy_from_user */
#include <linux/debugfs.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/kernel.h> /* min */