open() and mmap() from the driver

[Dmitry Shmidt]

Hi,

I want to access file from the driver. 
In user application I can access file through the pointer with the help of:
----------------------------------------------------------------
 fd = open( "myfile", O_RDWR );
 myptr = mmap( NULL, mysize, PROT_READ + PROT_WRITE, MAP_SHARED, fd, 0 );
 ...
 msync( myptr, mysize, MS_SYNC );
 munmap( myptr, mysize );
-----------------------------------------------------------------
 
Generally speaking I can use:
-----------------------------------------------------------------
 filp_open(filename);
 vmalloc(filesize);
 kernel_read() in loop
 ... Do something with the image in memory ...
And then I can
 kernel_write() in loop
 filp_close();
 vfree();
-----------------------------------------------------------------
However, it will be much more convenient to use some kind of mmap()
equivalent for this purpose. Is it possible ?

Thanks,

Dmitry
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