ida: Change ida_get_new_above to return the id
This calling convention makes more sense for the implementation as well
as the callers. It even shaves 32 bytes off the compiled code size.
Signed-off-by: Matthew Wilcox <willy@infradead.org>
diff --git a/lib/idr.c b/lib/idr.c
index 1dc5219..fab2fd5 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -363,7 +363,7 @@
#define IDA_MAX (0x80000000U / IDA_BITMAP_BITS - 1)
-static int ida_get_new_above(struct ida *ida, int start, int *id)
+static int ida_get_new_above(struct ida *ida, int start)
{
struct radix_tree_root *root = &ida->ida_rt;
void __rcu **slot;
@@ -402,8 +402,8 @@
if (ebit < BITS_PER_LONG) {
tmp |= 1UL << ebit;
rcu_assign_pointer(*slot, (void *)tmp);
- *id = new + ebit - RADIX_TREE_EXCEPTIONAL_SHIFT;
- return 0;
+ return new + ebit -
+ RADIX_TREE_EXCEPTIONAL_SHIFT;
}
bitmap = this_cpu_xchg(ida_bitmap, NULL);
if (!bitmap)
@@ -434,8 +434,7 @@
RADIX_TREE_EXCEPTIONAL_ENTRY);
radix_tree_iter_replace(root, &iter, slot,
bitmap);
- *id = new;
- return 0;
+ return new;
}
bitmap = this_cpu_xchg(ida_bitmap, NULL);
if (!bitmap)
@@ -444,8 +443,7 @@
radix_tree_iter_replace(root, &iter, slot, bitmap);
}
- *id = new;
- return 0;
+ return new;
}
}
@@ -534,7 +532,7 @@
int ida_alloc_range(struct ida *ida, unsigned int min, unsigned int max,
gfp_t gfp)
{
- int ret, id = 0;
+ int id = 0;
unsigned long flags;
if ((int)min < 0)
@@ -545,24 +543,20 @@
again:
xa_lock_irqsave(&ida->ida_rt, flags);
- ret = ida_get_new_above(ida, min, &id);
- if (!ret) {
- if (id > max) {
- ida_remove(ida, id);
- ret = -ENOSPC;
- } else {
- ret = id;
- }
+ id = ida_get_new_above(ida, min);
+ if (id > (int)max) {
+ ida_remove(ida, id);
+ id = -ENOSPC;
}
xa_unlock_irqrestore(&ida->ida_rt, flags);
- if (unlikely(ret == -EAGAIN)) {
+ if (unlikely(id == -EAGAIN)) {
if (!ida_pre_get(ida, gfp))
return -ENOMEM;
goto again;
}
- return ret;
+ return id;
}
EXPORT_SYMBOL(ida_alloc_range);