| __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¶
| May 2024 | Kernel Hackers Manual 2.6. |