git: 33491120e5fa - stable/13 - fd_probe: only define unit on x86, other platforms don't use this code

The branch stable/13 has been updated by imp:

URL: https://cgit.FreeBSD.org/src/commit/?id=33491120e5fa4511367b5779a84d32922ccb784b

commit 33491120e5fa4511367b5779a84d32922ccb784b
Author:     Warner Losh <imp@FreeBSD.org>
AuthorDate: 2022-07-08 17:53:30 +0000
Commit:     Warner Losh <imp@FreeBSD.org>
CommitDate: 2022-10-02 04:25:52 +0000

    fd_probe: only define unit on x86, other platforms don't use this code
    
    Sponsored by:           Netflix
    
    (cherry picked from commit 05d3c5fd182eeb33075ee14e2802c94882dc2c41)
---
 sys/dev/fdc/fdc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/dev/fdc/fdc.c b/sys/dev/fdc/fdc.c
index 11262231c3b2..4e771eead119 100644
--- a/sys/dev/fdc/fdc.c
+++ b/sys/dev/fdc/fdc.c
@@ -1897,7 +1897,9 @@ fdc_print_child(device_t me, device_t child)
 static int
 fd_probe(device_t dev)
 {
+#if defined(__i386__) || defined(__amd64__)
 	int	unit;
+#endif
 	int	i;
 	u_int	st0, st3;
 	struct	fd_data *fd;
@@ -1913,7 +1915,6 @@ fd_probe(device_t dev)
 	fd->dev = dev;
 	fd->fdc = fdc;
 	fd->fdsu = fdsu;
-	unit = device_get_unit(dev);
 
 	/* Auto-probe if fdinfo is present, but always allow override. */
 	type = flags & FD_TYPEMASK;
@@ -1927,6 +1928,7 @@ fd_probe(device_t dev)
 	}
 
 #if defined(__i386__) || defined(__amd64__)
+	unit = device_get_unit(dev);
 	if (fd->type == FDT_NONE && (unit == 0 || unit == 1)) {
 		/* Look up what the BIOS thinks we have. */
 		if (unit == 0)