__check_region man page on Scientific

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__CHECK_REGION(9)	      Hardware Interfaces	     __CHECK_REGION(9)

NAME
       __check_region - check if a resource region is busy or free

SYNOPSIS
       int __check_region(struct resource * parent, resource_size_t start,
			  resource_size_t n);

ARGUMENTS
       parent
	   parent resource descriptor

       start
	   resource start address

       n
	   resource region size

DESCRIPTION
       Returns 0 if the region is free at the moment it is checked, returns
       -EBUSY if the region is busy.

NOTE
       This function is deprecated because its use is racy. Even if it returns
       0, a subsequent call to request_region may fail because another driver
       etc. just allocated the region. Do NOT use it. It will be removed from
       the kernel.

COPYRIGHT
Kernel Hackers Manual 2.6.	 November 2013		     __CHECK_REGION(9)
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