[PATCH] Added usb_string function to a namespace

[Kevin Paul Reddy Janagari]

with reference to WARNING:
Duplicate C declaration, also defined at driver-api/usb/gadget:804
There is a function usb_string in the file message.c,
there is also a struct usb_string in the kernel api headers.
The docs is unable to index the function as the index is occupied by struct
This fix adds messgae.c to the usb_core namespace (in docs) hence providing
usb_sting a unique index usb_core.usb_string()

Signed-off-by: Kevin Paul Reddy Janagari <kevinpaul468@xxxxxxxxx>
---
 Documentation/driver-api/usb/usb.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/driver-api/usb/usb.rst b/Documentation/driver-api/usb/usb.rst
index 89f9c37bb979..976fb4221062 100644
--- a/Documentation/driver-api/usb/usb.rst
+++ b/Documentation/driver-api/usb/usb.rst
@@ -161,6 +161,7 @@ rely on 64bit DMA to eliminate another kind of bounce buffer.
 .. kernel-doc:: drivers/usb/core/urb.c
    :export:
 
+.. c:namespace:: usb_core
 .. kernel-doc:: drivers/usb/core/message.c
    :export:
 
-- 
2.39.5