idr_pre

idr_pre_get
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Name

idr_pre_get — reserve resources for idr allocation

Synopsis

`int idr_pre_get (`	struct idr * `idp`,
	gfp_t `gfp_mask)`;

Arguments

idp: idr handle
gfp_mask: memory allocation flags

Description

This function should be called prior to calling the idr_get_new* functions. It preallocates enough memory to satisfy the worst possible allocation. The caller should pass in GFP_KERNEL if possible. This of course requires that no spinning locks be held.

If the system is REALLY out of memory this function returns 0, otherwise 1.