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| author | Zijun Hu <quic_zijuhu@quicinc.com> | 2024-09-18 16:48:13 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-10-14 08:21:09 +0200 |
| commit | 0ee4dcafda9576910559f0471a3d6891daf9ab92 (patch) | |
| tree | 819b49052fa03964ee82978d2164954516cbb281 /lib | |
| parent | devres: Fix page faults when tracing devres from unloaded modules (diff) | |
| download | linux-0ee4dcafda9576910559f0471a3d6891daf9ab92.tar.xz linux-0ee4dcafda9576910559f0471a3d6891daf9ab92.zip | |
lib: devres: Simplify API devm_iounmap() implementation
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>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/devres.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/lib/devres.c b/lib/devres.c index 4fc152de6d8b..68ffcd5d9358 100644 --- a/lib/devres.c +++ b/lib/devres.c @@ -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); |