Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2024-12-28 16:52:18 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

lib: devres: Simplify API devm_iounmap() implementation

Browse Source 
Simplify devm_iounmap() implementation by dedicated API devres_release()
compared with current solution, namely, devres_destroy() + iounmap()
devres_release() has the following advantages:

- it is simpler if devm_iounmap()'s parameter @addr is valid, namely
  @addr was ever returned by one of devm_ioremap() variants.

- it can avoid unnecessary iounmap(@addr) if @addr is not valid.

Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
Link: https://lore.kernel.org/r/20240918-fix_lib_devres-v1-1-e696ab5486e6@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Zijun Hu 2024-09-18 22:48:13 +08:00 committed by Greg Kroah-Hartman
parent 7653995537
commit 0ee4dcafda
1 changed files with 1 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
lib/devres.c
View File

@ -115,9 +115,8 @@ EXPORT_SYMBOL(devm_ioremap_wc);
*/
void devm_iounmap(struct device *dev, void __iomem *addr)
{
WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
WARN_ON(devres_release(dev, devm_ioremap_release, devm_ioremap_match,
(__force void *)addr));
iounmap(addr);
}
EXPORT_SYMBOL(devm_iounmap);