git: 3e0270c52875 - stable/15 - kern: osd: abstract away the math for locating a slot method

The branch stable/15 has been updated by kevans:

URL: https://cgit.FreeBSD.org/src/commit/?id=3e0270c52875faefad6ddce7285f8c8047d423ef

commit 3e0270c52875faefad6ddce7285f8c8047d423ef
Author:     Kyle Evans <[email protected]>
AuthorDate: 2026-06-25 03:08:05 +0000
Commit:     Kyle Evans <[email protected]>
CommitDate: 2026-08-06 23:35:54 +0000

    kern: osd: abstract away the math for locating a slot method
    
    It's relatively simple, but we'll do it a couple of times; pull it
    out into a macro.
    
    Reviewed by:    imp (previous version), jamie
    
    (cherry picked from commit 72ebcfae48c42cb28ab6142980416082f8d70abc)
---
 sys/kern/kern_osd.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/sys/kern/kern_osd.c b/sys/kern/kern_osd.c
index 93809ccab8e5..b64735e7f93a 100644
--- a/sys/kern/kern_osd.c
+++ b/sys/kern/kern_osd.c
@@ -73,6 +73,9 @@ SYSCTL_INT(_debug, OID_AUTO, osd, CTLFLAG_RWTUN, &osd_debug, 0, "OSD debug level
 	}								\
 } while (0)
 
+#define	OSD_METHOD(osdm, slot, method)	\
+    ((osdm).osd_methods[((slot) - 1) * (osdm).osd_nmethods + (method)])
+
 static void do_osd_del(u_int type, struct osd *osd, u_int slot,
     int list_locked);
 
@@ -139,8 +142,8 @@ osd_register(u_int type, osd_destructor_t destructor, const osd_method_t *method
 	osdm[type].osd_destructors[i] = destructor;
 	if (osdm[type].osd_nmethods != 0) {
 		for (m = 0; m < osdm[type].osd_nmethods; m++)
-			osdm[type].osd_methods[i * osdm[type].osd_nmethods + m]
-			    = methods != NULL ? methods[m] : NULL;
+			OSD_METHOD(osdm[type], i + 1, m) =
+			    methods != NULL ? methods[m] : NULL;
 	}
 	sx_xunlock(&osdm[type].osd_module_lock);
 	return (i + 1);
@@ -391,8 +394,7 @@ osd_call(u_int type, u_int method, void *obj, void *data)
 		/* Hole in the slot map; avoid dereferencing. */
 		if (osdm[type].osd_destructors[i] == NULL)
 			continue;
-		methodfun = osdm[type].osd_methods[i * osdm[type].osd_nmethods +
-		    method];
+		methodfun = OSD_METHOD(osdm[type], i + 1, method);
 		if (methodfun != NULL && (error = methodfun(obj, data)) != 0)
 			break;
 	}