kernel-doc: xforms: support __SYSFS_FUNCTION_ALTERNATIVE()

Add support for __SYSFS_FUNCTION_ALTERNATIVE() to create a union of its
members (as though CONFIG_CFI is unset).

Fixes these docs build warnings:

WARNING: include/linux/device.h:117 Invalid param: __SYSFS_FUNCTION_ALTERNATIVE( ssize_t (*show)(struct device *dev, struct device_attribute *attr, char *buf)
WARNING: include/linux/device.h:117 struct member '__SYSFS_FUNCTION_ALTERNATIVE( ssize_t (*show' not described in 'device_attribute'
WARNING: include/linux/device.h:117 Invalid param: __SYSFS_FUNCTION_ALTERNATIVE( ssize_t (*store)(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
WARNING: include/linux/device.h:117 struct member '__SYSFS_FUNCTION_ALTERNATIVE( ssize_t (*store' not described in 'device_attribute'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260623190006.406571-1-rdunlap@infradead.org>

diff --git a/tools/lib/python/kdoc/xforms_lists.py b/tools/lib/python/kdoc/xforms_lists.py
index aab70e5eaa6fa281ad73f568f83dfdc2f782dfb2..0734f9f94bf841a6fee82f1e9f00cd2b19d7951f 100644 (file)
--- a/tools/lib/python/kdoc/xforms_lists.py
+++ b/tools/lib/python/kdoc/xforms_lists.py
@@ -49,6 +49,7 @@ class CTransforms:
         (CMatch("DEFINE_DMA_UNMAP_ADDR"), r"dma_addr_t \1"),
         (CMatch("DEFINE_DMA_UNMAP_LEN"), r"__u32 \1"),
         (CMatch("VIRTIO_DECLARE_FEATURES"), r"union { u64 \1; u64 \1_array[VIRTIO_FEATURES_U64S]; }"),
+        (CMatch("__SYSFS_FUNCTION_ALTERNATIVE"), r"union { \1+ }"),
         (CMatch("__attribute__"), ""),
 
         #