[xen staging] drivers/char: make serial_parse_handle take const argument

[patchbot@xxxxxxx]

commit ee8d9d0c1c1a8cef8ebcae16e0f574542d319e26
Author:     Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
AuthorDate: Tue Aug 16 11:23:26 2022 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Aug 16 11:23:26 2022 +0200

    drivers/char: make serial_parse_handle take const argument
    
    It doesn't modify it, and it will be necessary in a subsequent patch.
    
    Signed-off-by: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/drivers/char/serial.c | 2 +-
 xen/include/xen/serial.h  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/drivers/char/serial.c b/xen/drivers/char/serial.c
index f6c944bd30..47899222ce 100644
--- a/xen/drivers/char/serial.c
+++ b/xen/drivers/char/serial.c
@@ -301,7 +301,7 @@ char serial_getc(int handle)
     return c & 0x7f;
 }
 
-int __init serial_parse_handle(char *conf)
+int __init serial_parse_handle(const char *conf)
 {
     int handle, flags = 0;
 
diff --git a/xen/include/xen/serial.h b/xen/include/xen/serial.h
index 181e026967..4cd4ae5e6f 100644
--- a/xen/include/xen/serial.h
+++ b/xen/include/xen/serial.h
@@ -109,7 +109,7 @@ void serial_init_postirq(void);
 void serial_endboot(void);
 
 /* Takes a config string and creates a numeric handle on the COM port. */
-int serial_parse_handle(char *conf);
+int serial_parse_handle(const char *conf);
 
 /* Transmit a single character via the specified COM port. */
 void serial_putc(int handle, char c);
--
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