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Linux/Documentation/userspace-api/media/dvb/dmx-munmap.rst

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Diff markup

Differences between /Documentation/userspace-api/media/dvb/dmx-munmap.rst (Version linux-6.12-rc7) and /Documentation/userspace-api/media/dvb/dmx-munmap.rst (Version linux-5.4.285)


  1 .. SPDX-License-Identifier: GFDL-1.1-no-invari    
  2 .. c:namespace:: DTV.dmx                          
  3                                                   
  4 .. _dmx-munmap:                                   
  5                                                   
  6 ************                                      
  7 DVB munmap()                                      
  8 ************                                      
  9                                                   
 10 Name                                              
 11 ====                                              
 12                                                   
 13 dmx-munmap - Unmap device memory                  
 14                                                   
 15 .. warning:: This API is still experimental.      
 16                                                   
 17 Synopsis                                          
 18 ========                                          
 19                                                   
 20 .. code-block:: c                                 
 21                                                   
 22     #include <unistd.h>                           
 23     #include <sys/mman.h>                         
 24                                                   
 25 .. c:function:: int munmap( void *start, size_    
 26                                                   
 27 Arguments                                         
 28 =========                                         
 29                                                   
 30 ``start``                                         
 31     Address of the mapped buffer as returned b    
 32     :c:func:`mmap()` function.                    
 33                                                   
 34 ``length``                                        
 35     Length of the mapped buffer. This must be     
 36     :c:func:`mmap()`.                             
 37                                                   
 38 Description                                       
 39 ===========                                       
 40                                                   
 41 Unmaps a previously with the :c:func:`mmap()`     
 42 buffer and frees it, if possible.                 
 43                                                   
 44 Return Value                                      
 45 ============                                      
 46                                                   
 47 On success :c:func:`munmap()` returns 0, on fa    
 48 ``errno`` variable is set appropriately:          
 49                                                   
 50 EINVAL                                            
 51     The ``start`` or ``length`` is incorrect,     
 52     mapped yet.                                   
                                                      

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