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arch/sh/kernel/dwarf.c: use rbtree postorder iteration helper instead of solution using repeated rb_erase()

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Use rbtree_postorder_for_each_entry_safe() to destroy the rbtree instead
of using repeated rb_erase() calls

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Cody P Schafer 2014-01-23 15:56:14 -08:00 committed by Linus Torvalds
parent ed8f68669a
commit e376ed7c85
1 changed files with 4 additions and 14 deletions
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18
arch/sh/kernel/dwarf.c
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@ -995,29 +995,19 @@ static struct unwinder dwarf_unwinder = {
static void dwarf_unwinder_cleanup(void)
{
struct rb_node **fde_rb_node = &fde_root.rb_node;
struct rb_node **cie_rb_node = &cie_root.rb_node;
struct dwarf_fde *fde, *next_fde;
struct dwarf_cie *cie, *next_cie;
/*
* Deallocate all the memory allocated for the DWARF unwinder.
* Traverse all the FDE/CIE lists and remove and free all the
* memory associated with those data structures.
*/
while (*fde_rb_node) {
struct dwarf_fde *fde;
fde = rb_entry(*fde_rb_node, struct dwarf_fde, node);
rb_erase(*fde_rb_node, &fde_root);
rbtree_postorder_for_each_entry_safe(fde, next_fde, &fde_root, node)
kfree(fde);
}
while (*cie_rb_node) {
struct dwarf_cie *cie;
cie = rb_entry(*cie_rb_node, struct dwarf_cie, node);
rb_erase(*cie_rb_node, &cie_root);
rbtree_postorder_for_each_entry_safe(cie, next_cie, &cie_root, node)
kfree(cie);
}
kmem_cache_destroy(dwarf_reg_cachep);
kmem_cache_destroy(dwarf_frame_cachep);