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| author | Matthew Wilcox <willy@infradead.org> | 2018-06-18 19:11:56 -0400 |
|---|---|---|
| committer | Matthew Wilcox <willy@infradead.org> | 2018-08-21 23:54:21 -0400 |
| commit | 1df895190233fcc30d46beca4550bcafb7b959a6 (patch) | |
| tree | e71ce3cf8322831d2a75be80540a0956993bca42 /lib | |
| parent | b03f8e43c9261878bf29d8cc1c3ba458cc98287e (diff) | |
| download | linux-1df895190233fcc30d46beca4550bcafb7b959a6.tar.bz2 | |
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>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/idr.c | 30 |
1 files changed, 12 insertions, 18 deletions
diff --git a/lib/idr.c b/lib/idr.c index 1dc52191acb6..fab2fd5bc326 100644 --- a/lib/idr.c +++ b/lib/idr.c @@ -363,7 +363,7 @@ EXPORT_SYMBOL(idr_replace); #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 @@ static int ida_get_new_above(struct ida *ida, int start, int *id) 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 @@ static int ida_get_new_above(struct ida *ida, int start, int *id) 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 @@ static int ida_get_new_above(struct ida *ida, int start, int *id) radix_tree_iter_replace(root, &iter, slot, bitmap); } - *id = new; - return 0; + return new; } } @@ -534,7 +532,7 @@ EXPORT_SYMBOL(ida_destroy); 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 @@ int ida_alloc_range(struct ida *ida, unsigned int min, unsigned int max, 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); |