git: b5f0f20e9bd1 - stable/13 - intr: merge interrupt table uses of MAXCOMLEN into INTRNAME_LEN

The branch stable/13 has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=b5f0f20e9bd1999d9c606f2a20a08a54c7f5ccfe

commit b5f0f20e9bd1999d9c606f2a20a08a54c7f5ccfe
Author:     Elliott Mitchell <ehem+freebsd@m5p.com>
AuthorDate: 2023-01-20 02:24:32 +0000
Commit:     Mark Johnston <markj@FreeBSD.org>
CommitDate: 2023-08-31 13:24:05 +0000

    intr: merge interrupt table uses of MAXCOMLEN into INTRNAME_LEN
    
    The repeated uses of `MAXCOMLEN + 1` seem a bit hazardous.  If there was
    a future need to change the size, the repeats will be troublesome.
    Merge everything into `#define INTRNAME_LEN` (matches the name used by
    INTRNG).
    
    Reviewed by:    markj
    MFC after:      2 weeks
    Differential Revision:  https://reviews.freebsd.org/D38455
    
    (cherry picked from commit 5ad59b91535f2df176c132be10e344c4a302f619)
---
 sys/powerpc/powerpc/intr_machdep.c |  9 +++++----
 sys/x86/x86/intr_machdep.c         | 13 +++++++------
 2 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/sys/powerpc/powerpc/intr_machdep.c b/sys/powerpc/powerpc/intr_machdep.c
index 605f436804d4..c314a2c928bc 100644
--- a/sys/powerpc/powerpc/intr_machdep.c
+++ b/sys/powerpc/powerpc/intr_machdep.c
@@ -129,6 +129,7 @@ static u_int nirqs = 0;		/* Allocated IRQs. */
 #endif
 static u_int stray_count;
 
+#define	INTRNAME_LEN	(MAXCOMLEN + 1)
 u_long *intrcnt;
 char *intrnames;
 size_t sintrcnt = sizeof(intrcnt);
@@ -154,8 +155,8 @@ static void
 intrcnt_setname(const char *name, int index)
 {
 
-	snprintf(intrnames + (MAXCOMLEN + 1) * index, MAXCOMLEN + 1, "%-*s",
-	    MAXCOMLEN, name);
+	snprintf(intrnames + INTRNAME_LEN * index, INTRNAME_LEN, "%-*s",
+	    INTRNAME_LEN - 1, name);
 }
 
 static void
@@ -179,10 +180,10 @@ intr_init_sources(void *arg __unused)
 #endif
 	intrcnt = mallocarray(nintrcnt, sizeof(u_long), M_INTR, M_WAITOK |
 	    M_ZERO);
-	intrnames = mallocarray(nintrcnt, MAXCOMLEN + 1, M_INTR, M_WAITOK |
+	intrnames = mallocarray(nintrcnt, INTRNAME_LEN, M_INTR, M_WAITOK |
 	    M_ZERO);
 	sintrcnt = nintrcnt * sizeof(u_long);
-	sintrnames = nintrcnt * (MAXCOMLEN + 1);
+	sintrnames = nintrcnt * INTRNAME_LEN;
 
 	intrcnt_setname("???", 0);
 	intrcnt_index = 1;
diff --git a/sys/x86/x86/intr_machdep.c b/sys/x86/x86/intr_machdep.c
index b89af6c4c2a1..d7c325c82399 100644
--- a/sys/x86/x86/intr_machdep.c
+++ b/sys/x86/x86/intr_machdep.c
@@ -95,6 +95,7 @@ u_int num_io_irqs;
 static int assign_cpu;
 #endif
 
+#define	INTRNAME_LEN	(MAXCOMLEN + 1)
 u_long *intrcnt;
 char *intrnames;
 size_t sintrcnt = sizeof(intrcnt);
@@ -189,10 +190,10 @@ intr_init_sources(void *arg)
 #endif
 	intrcnt = mallocarray(nintrcnt, sizeof(u_long), M_INTR, M_WAITOK |
 	    M_ZERO);
-	intrnames = mallocarray(nintrcnt, MAXCOMLEN + 1, M_INTR, M_WAITOK |
+	intrnames = mallocarray(nintrcnt, INTRNAME_LEN, M_INTR, M_WAITOK |
 	    M_ZERO);
 	sintrcnt = nintrcnt * sizeof(u_long);
-	sintrnames = nintrcnt * (MAXCOMLEN + 1);
+	sintrnames = nintrcnt * INTRNAME_LEN;
 
 	intrcnt_setname("???", 0);
 	intrcnt_index = 1;
@@ -430,8 +431,8 @@ static void
 intrcnt_setname(const char *name, int index)
 {
 
-	snprintf(intrnames + (MAXCOMLEN + 1) * index, MAXCOMLEN + 1, "%-*s",
-	    MAXCOMLEN, name);
+	snprintf(intrnames + INTRNAME_LEN * index, INTRNAME_LEN, "%-*s",
+	    INTRNAME_LEN - 1, name);
 }
 
 static void
@@ -444,14 +445,14 @@ intrcnt_updatename(struct intsrc *is)
 static void
 intrcnt_register(struct intsrc *is)
 {
-	char straystr[MAXCOMLEN + 1];
+	char straystr[INTRNAME_LEN];
 
 	KASSERT(is->is_event != NULL, ("%s: isrc with no event", __func__));
 	mtx_lock_spin(&intrcnt_lock);
 	MPASS(intrcnt_index + 2 <= nintrcnt);
 	is->is_index = intrcnt_index;
 	intrcnt_index += 2;
-	snprintf(straystr, MAXCOMLEN + 1, "stray irq%d",
+	snprintf(straystr, sizeof(straystr), "stray irq%d",
 	    is->is_pic->pic_vector(is));
 	intrcnt_updatename(is);
 	is->is_count = &intrcnt[is->is_index];