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__check_region
Langue: en
Version: June 2009 (debian - 07/07/09)
Section: 9 (Appels noyau Linux)
NAME
__check_region - check if a resource region is busy or freeSYNOPSIS
- 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.
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