git: 165cc0eea9d1 - stable/14 - busdma: emit a warning for use of filters

The branch stable/14 has been updated by mhorne:

URL: https://cgit.FreeBSD.org/src/commit/?id=165cc0eea9d1e35bc448e8b329ed1919fba6bcd3

commit 165cc0eea9d1e35bc448e8b329ed1919fba6bcd3
Author:     Mitchell Horne <mhorne@FreeBSD.org>
AuthorDate: 2023-12-04 15:46:48 +0000
Commit:     Mitchell Horne <mhorne@FreeBSD.org>
CommitDate: 2023-12-06 23:23:14 +0000

    busdma: emit a warning for use of filters
    
    Filter functions are deprecated, and unused in the tree. If either of
    the filter or filterarg arguments to bus_dma_tag_create() are non-NULL,
    print a warning.
    
    This is a direct commit to stable/14.
    
    Reviewed by:    jhb
    Sponsored by:   The FreeBSD Foundation
    Differential Revision:  https://reviews.freebsd.org/D42897
---
 sys/arm/arm/busdma_machdep.c         | 4 ++++
 sys/arm64/arm64/busdma_machdep.c     | 4 ++++
 sys/powerpc/powerpc/busdma_machdep.c | 4 ++++
 sys/riscv/riscv/busdma_machdep.c     | 4 ++++
 sys/x86/x86/busdma_machdep.c         | 4 ++++
 5 files changed, 20 insertions(+)

diff --git a/sys/arm/arm/busdma_machdep.c b/sys/arm/arm/busdma_machdep.c
index 07a3da114441..8dd4f3bff23d 100644
--- a/sys/arm/arm/busdma_machdep.c
+++ b/sys/arm/arm/busdma_machdep.c
@@ -398,6 +398,10 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
 	/* Return a NULL tag on failure */
 	*dmat = NULL;
 
+	/* Filters are deprecated, emit a warning. */
+	if (filter != NULL || filterarg != NULL)
+		printf("Warning: use of filters is deprecated; see busdma(9)\n");
+
 	newtag = (bus_dma_tag_t)malloc(sizeof(*newtag), M_BUSDMA,
 	    M_ZERO | M_NOWAIT);
 	if (newtag == NULL) {
diff --git a/sys/arm64/arm64/busdma_machdep.c b/sys/arm64/arm64/busdma_machdep.c
index 14fd96ac919c..c1b710e3538d 100644
--- a/sys/arm64/arm64/busdma_machdep.c
+++ b/sys/arm64/arm64/busdma_machdep.c
@@ -161,6 +161,10 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
 	struct bus_dma_tag_common *tc;
 	int error;
 
+	/* Filters are deprecated, emit a warning. */
+	if (filter != NULL || filterarg != NULL)
+		printf("Warning: use of filters is deprecated; see busdma(9)\n");
+
 	if (parent == NULL) {
 		error = bus_dma_bounce_impl.tag_create(parent, alignment,
 		    boundary, lowaddr, highaddr, filter, filterarg, maxsize,
diff --git a/sys/powerpc/powerpc/busdma_machdep.c b/sys/powerpc/powerpc/busdma_machdep.c
index bffbfa94acac..873a67458dfc 100644
--- a/sys/powerpc/powerpc/busdma_machdep.c
+++ b/sys/powerpc/powerpc/busdma_machdep.c
@@ -168,6 +168,10 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
 		return (EINVAL);
 	}
 
+	/* Filters are deprecated, emit a warning. */
+	if (filter != NULL || filterarg != NULL)
+		printf("Warning: use of filters is deprecated; see busdma(9)\n");
+
 	/* Return a NULL tag on failure */
 	*dmat = NULL;
 
diff --git a/sys/riscv/riscv/busdma_machdep.c b/sys/riscv/riscv/busdma_machdep.c
index 19cfd21edc6e..e8aca33a86c0 100644
--- a/sys/riscv/riscv/busdma_machdep.c
+++ b/sys/riscv/riscv/busdma_machdep.c
@@ -162,6 +162,10 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
 	struct bus_dma_tag_common *tc;
 	int error;
 
+	/* Filters are deprecated, emit a warning. */
+	if (filter != NULL || filterarg != NULL)
+		printf("Warning: use of filters is deprecated; see busdma(9)\n");
+
 	if (parent == NULL) {
 		error = bus_dma_bounce_impl.tag_create(parent, alignment,
 		    boundary, lowaddr, highaddr, filter, filterarg, maxsize,
diff --git a/sys/x86/x86/busdma_machdep.c b/sys/x86/x86/busdma_machdep.c
index 0e72b09684cc..ee614548aea7 100644
--- a/sys/x86/x86/busdma_machdep.c
+++ b/sys/x86/x86/busdma_machdep.c
@@ -184,6 +184,10 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
 	struct bus_dma_tag_common *tc;
 	int error;
 
+	/* Filters are deprecated, emit a warning. */
+	if (filter != NULL || filterarg != NULL)
+		printf("Warning: use of filters is deprecated; see busdma(9)\n");
+
 	if (parent == NULL) {
 		error = bus_dma_bounce_impl.tag_create(parent, alignment,
 		    boundary, lowaddr, highaddr, filter, filterarg, maxsize,