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Commit c8615d37 authored by Tejun Heo's avatar Tejun Heo Committed by Linus Torvalds
Browse files

idr: deprecate idr_pre_get() and idr_get_new[_above]() 



Now that all in-kernel users are converted to ues the new alloc
interface, mark the old interface deprecated.  We should be able to
remove these in a few releases.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 8e467e85

include/linux/idr.h

+50 −16
Original line number Diff line number Diff line
@@ -73,8 +73,6 @@ struct idr { 
 */



void *idr_find_slowpath(struct idr *idp, int id);

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

int idr_get_new_above(struct idr *idp, void *ptr, int starting_id, int *id);

void idr_preload(gfp_t gfp_mask);

int idr_alloc(struct idr *idp, void *ptr, int start, int end, gfp_t gfp_mask);

int idr_for_each(struct idr *idp,
@@ -120,30 +118,66 @@ static inline void *idr_find(struct idr *idr, int id) 
}



/**

 * idr_get_new - allocate new idr entry

 * idr_for_each_entry - iterate over an idr's elements of a given type

 * @idp:     idr handle

 * @entry:   the type * to use as cursor

 * @id:      id entry's key

 */

#define idr_for_each_entry(idp, entry, id)				\

	for (id = 0, entry = (typeof(entry))idr_get_next((idp), &(id)); \

	     entry != NULL;                                             \

	     ++id, entry = (typeof(entry))idr_get_next((idp), &(id)))



/*

 * Don't use the following functions.  These exist only to suppress

 * deprecated warnings on EXPORT_SYMBOL()s.

 */

int __idr_pre_get(struct idr *idp, gfp_t gfp_mask);

int __idr_get_new_above(struct idr *idp, void *ptr, int starting_id, int *id);

void __idr_remove_all(struct idr *idp);



/**

 * idr_pre_get - reserve resources for idr allocation

 * @idp:	idr handle

 * @gfp_mask:	memory allocation flags

 *

 * Part of old alloc interface.  This is going away.  Use

 * idr_preload[_end]() and idr_alloc() instead.

 */

static inline int __deprecated idr_pre_get(struct idr *idp, gfp_t gfp_mask)

{

	return __idr_pre_get(idp, gfp_mask);

}



/**

 * idr_get_new_above - allocate new idr entry above or equal to a start id

 * @idp: idr handle

 * @ptr: pointer you want associated with the id

 * @starting_id: id to start search at

 * @id: pointer to the allocated handle

 *

 * Simple wrapper around idr_get_new_above() w/ @starting_id of zero.

 * Part of old alloc interface.  This is going away.  Use

 * idr_preload[_end]() and idr_alloc() instead.

 */

static inline int idr_get_new(struct idr *idp, void *ptr, int *id)

static inline int __deprecated idr_get_new_above(struct idr *idp, void *ptr,

						 int starting_id, int *id)

{

	return idr_get_new_above(idp, ptr, 0, id);

	return __idr_get_new_above(idp, ptr, starting_id, id);

}



/**

 * idr_for_each_entry - iterate over an idr's elements of a given type

 * idr_get_new - allocate new idr entry

 * @idp: idr handle

 * @entry:   the type * to use as cursor

 * @id:      id entry's key

 * @ptr: pointer you want associated with the id

 * @id: pointer to the allocated handle

 *

 * Part of old alloc interface.  This is going away.  Use

 * idr_preload[_end]() and idr_alloc() instead.

 */

#define idr_for_each_entry(idp, entry, id)				\

	for (id = 0, entry = (typeof(entry))idr_get_next((idp), &(id)); \

	     entry != NULL;                                             \

	     ++id, entry = (typeof(entry))idr_get_next((idp), &(id)))



void __idr_remove_all(struct idr *idp);	/* don't use */

static inline int __deprecated idr_get_new(struct idr *idp, void *ptr, int *id)

{

	return __idr_get_new_above(idp, ptr, 0, id);

}



/**

 * idr_remove_all - remove all ids from the given idr tree

lib/idr.c

+5 −36
Original line number Diff line number Diff line
@@ -184,20 +184,7 @@ static void idr_mark_full(struct idr_layer **pa, int id) 
	}

}



/**

 * idr_pre_get - reserve resources for idr allocation

 * @idp:	idr handle

 * @gfp_mask:	memory allocation flags

 *

 * 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.

 */

int idr_pre_get(struct idr *idp, gfp_t gfp_mask)

int __idr_pre_get(struct idr *idp, gfp_t gfp_mask)

{

	while (idp->id_free_cnt < MAX_IDR_FREE) {

		struct idr_layer *new;
@@ -208,7 +195,7 @@ int idr_pre_get(struct idr *idp, gfp_t gfp_mask) 
	}

	return 1;

}

EXPORT_SYMBOL(idr_pre_get);

EXPORT_SYMBOL(__idr_pre_get);



/**

 * sub_alloc - try to allocate an id without growing the tree depth
@@ -375,25 +362,7 @@ static void idr_fill_slot(struct idr *idr, void *ptr, int id, 
	idr_mark_full(pa, id);

}



/**

 * idr_get_new_above - allocate new idr entry above or equal to a start id

 * @idp: idr handle

 * @ptr: pointer you want associated with the id

 * @starting_id: id to start search at

 * @id: pointer to the allocated handle

 *

 * This is the allocate id function.  It should be called with any

 * required locks.

 *

 * If allocation from IDR's private freelist fails, idr_get_new_above() will

 * return %-EAGAIN.  The caller should retry the idr_pre_get() call to refill

 * IDR's preallocation and then retry the idr_get_new_above() call.

 *

 * If the idr is full idr_get_new_above() will return %-ENOSPC.

 *

 * @id returns a value in the range @starting_id ... %0x7fffffff

 */

int idr_get_new_above(struct idr *idp, void *ptr, int starting_id, int *id)

int __idr_get_new_above(struct idr *idp, void *ptr, int starting_id, int *id)

{

	struct idr_layer *pa[MAX_IDR_LEVEL + 1];

	int rv;
@@ -406,7 +375,7 @@ int idr_get_new_above(struct idr *idp, void *ptr, int starting_id, int *id) 
	*id = rv;

	return 0;

}

EXPORT_SYMBOL(idr_get_new_above);

EXPORT_SYMBOL(__idr_get_new_above);



/**

 * idr_preload - preload for idr_alloc()
@@ -907,7 +876,7 @@ static void free_bitmap(struct ida *ida, struct ida_bitmap *bitmap) 
int ida_pre_get(struct ida *ida, gfp_t gfp_mask)

{

	/* allocate idr_layers */

	if (!idr_pre_get(&ida->idr, gfp_mask))

	if (!__idr_pre_get(&ida->idr, gfp_mask))

		return 0;



	/* allocate free_bitmap */