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ida: Remove old API 

Delete ida_pre_get(), ida_get_new(), ida_get_new_above() and ida_remove()
from the public API.  Some of these functions still exist as internal
helpers, but they should not be called by consumers.

Signed-off-by: Matthew Wilcox <willy@infradead.org>
This commit is contained in:
Matthew Wilcox 2018-06-18 19:02:48 -04:00
parent f272668deb
commit b03f8e43c9
3 changed files with 11 additions and 67 deletions
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21
include/linux/idr.h
View File

@ -225,13 +225,9 @@ struct ida {
}
#define DEFINE_IDA(name) struct ida name = IDA_INIT(name)
int ida_pre_get(struct ida *ida, gfp_t gfp_mask);
int ida_get_new_above(struct ida *ida, int starting_id, int *p_id);
void ida_remove(struct ida *ida, int id);
void ida_destroy(struct ida *ida);
int ida_alloc_range(struct ida *, unsigned int min, unsigned int max, gfp_t);
void ida_free(struct ida *, unsigned int id);
void ida_destroy(struct ida *ida);
/**
* ida_alloc() - Allocate an unused ID.
@ -292,20 +288,11 @@ static inline void ida_init(struct ida *ida)
ida_alloc_range(ida, start, (end) - 1, gfp)
#define ida_simple_remove(ida, id) ida_free(ida, id)
/**
* ida_get_new - allocate new ID
* @ida: idr handle
* @p_id: pointer to the allocated handle
*
* Simple wrapper around ida_get_new_above() w/ @starting_id of zero.
*/
static inline int ida_get_new(struct ida *ida, int *p_id)
{
return ida_get_new_above(ida, 0, p_id);
}
static inline bool ida_is_empty(const struct ida *ida)
{
return radix_tree_empty(&ida->ida_rt);
}
/* in lib/radix-tree.c */
int ida_pre_get(struct ida *ida, gfp_t gfp_mask);
#endif /* __IDR_H__ */

48
lib/idr.c
View File

@ -320,16 +320,9 @@ EXPORT_SYMBOL(idr_replace);
* ida_alloc(), ida_alloc_min(), ida_alloc_max() or ida_alloc_range().
* To free an ID, call ida_free().
*
* If you have more complex locking requirements, use a loop around
* ida_pre_get() and ida_get_new() to allocate a new ID. Then use
* ida_remove() to free an ID. You must make sure that ida_get_new() and
* ida_remove() cannot be called at the same time as each other for the
* same IDA.
*
* You can also use ida_get_new_above() if you need an ID to be allocated
* above a particular number. ida_destroy() can be used to dispose of an
* IDA without needing to free the individual IDs in it. You can use
* ida_is_empty() to find out whether the IDA has any IDs currently allocated.
* ida_destroy() can be used to dispose of an IDA without needing to
* free the individual IDs in it. You can use ida_is_empty() to find
* out whether the IDA has any IDs currently allocated.
*
* IDs are currently limited to the range [0-INT_MAX]. If this is an awkward
* limitation, it should be quite straightforward to raise the maximum.
@ -370,25 +363,7 @@ EXPORT_SYMBOL(idr_replace);
#define IDA_MAX (0x80000000U / IDA_BITMAP_BITS - 1)
/**
* ida_get_new_above - allocate new ID above or equal to a start id
* @ida: ida handle
* @start: id to start search at
* @id: pointer to the allocated handle
*
* Allocate new ID above or equal to @start. It should be called
* with any required locks to ensure that concurrent calls to
* ida_get_new_above() / ida_get_new() / ida_remove() are not allowed.
* Consider using ida_alloc_range() if you do not have complex locking
* requirements.
*
* If memory is required, it will return %-EAGAIN, you should unlock
* and go back to the ida_pre_get() call. If the ida is full, it will
* return %-ENOSPC. On success, it will return 0.
*
* @id returns a value in the range @start ... %0x7fffffff.
*/
int ida_get_new_above(struct ida *ida, int start, int *id)
static int ida_get_new_above(struct ida *ida, int start, int *id)
{
struct radix_tree_root *root = &ida->ida_rt;
void __rcu **slot;
@ -473,16 +448,8 @@ int ida_get_new_above(struct ida *ida, int start, int *id)
return 0;
}
}
EXPORT_SYMBOL(ida_get_new_above);
/**
* ida_remove - Free the given ID
* @ida: ida handle
* @id: ID to free
*
* This function should not be called at the same time as ida_get_new_above().
*/
void ida_remove(struct ida *ida, int id)
static void ida_remove(struct ida *ida, int id)
{
unsigned long index = id / IDA_BITMAP_BITS;
unsigned offset = id % IDA_BITMAP_BITS;
@ -519,9 +486,8 @@ void ida_remove(struct ida *ida, int id)
}
return;
err:
WARN(1, "ida_remove called for id=%d which is not allocated.\n", id);
WARN(1, "ida_free called for id=%d which is not allocated.\n", id);
}
EXPORT_SYMBOL(ida_remove);
/**
* ida_destroy() - Free all IDs.
@ -568,7 +534,7 @@ EXPORT_SYMBOL(ida_destroy);
int ida_alloc_range(struct ida *ida, unsigned int min, unsigned int max,
gfp_t gfp)
{
int ret, id;
int ret, id = 0;
unsigned long flags;
if ((int)min < 0)

9
lib/radix-tree.c
View File

@ -2106,14 +2106,6 @@ void idr_preload(gfp_t gfp_mask)
}
EXPORT_SYMBOL(idr_preload);
/**
* ida_pre_get - reserve resources for ida allocation
* @ida: ida handle
* @gfp: memory allocation flags
*
* This function should be called before calling ida_get_new_above(). If it
* is unable to allocate memory, it will return %0. On success, it returns %1.
*/
int ida_pre_get(struct ida *ida, gfp_t gfp)
{
/*
@ -2134,7 +2126,6 @@ int ida_pre_get(struct ida *ida, gfp_t gfp)
return 1;
}
EXPORT_SYMBOL(ida_pre_get);
void __rcu **idr_get_free(struct radix_tree_root *root,
struct radix_tree_iter *iter, gfp_t gfp,