centos man page for idr_alloc

Query: idr_alloc

OS: centos

Section: 9

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

IDR_ALLOC(9)						  Basic Kernel Library Functions					      IDR_ALLOC(9)

NAME
idr_alloc - allocate new idr entry
SYNOPSIS
int idr_alloc(struct idr * idr, void * ptr, int start, int end, gfp_t gfp_mask);
ARGUMENTS
idr the (initialized) idr ptr pointer to be associated with the new id start the minimum id (inclusive) end the maximum id (exclusive, <= 0 for max) gfp_mask memory allocation flags
DESCRIPTION
Allocate an id in [start, end) and associate it with ptr. If no ID is available in the specified range, returns -ENOSPC. On memory allocation failure, returns -ENOMEM. Note that end is treated as max when <= 0. This is to always allow using start + N as end as long as N is inside integer range. The user is responsible for exclusively synchronizing all operations which may modify idr. However, read-only accesses such as idr_find or iteration can be performed under RCU read lock provided the user destroys ptr in RCU-safe way after removal from idr.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 IDR_ALLOC(9)
Related Man Pages
bio_alloc_bioset(9) - centos
tcl_attemptrealloc(3) - mojave
tcl_alloc(3) - opendarwin
tcl_realloc(3) - opendarwin
reallocf(3) - linux
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