The branch main has been updated by des:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=146d9da6c2ece7edbc3c0c5cca4cf64e2b9e42c9

commit 146d9da6c2ece7edbc3c0c5cca4cf64e2b9e42c9
Author:     Dag-Erling Smørgrav <[email protected]>
AuthorDate: 2023-02-07 17:27:35 +0000
Commit:     Dag-Erling Smørgrav <[email protected]>
CommitDate: 2023-02-07 17:31:25 +0000

    tarfs: Silence warnings when no supported compression is enabled.
    
    Some of the code in sys/fs/tarfs/tarfs_io.c is not specific to zstd, but is 
still only used when some form of decompression is enabled.  Put it behind 
#ifdef TARFS_ZIO to silence warnings.
    
    Sponsored by:   Juniper Networks, Inc.
    Sponsored by:   Klara, Inc.
    Reviewed by:    kib
    Differential Revision:  https://reviews.freebsd.org/D38415
---
 sys/fs/tarfs/tarfs_io.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/sys/fs/tarfs/tarfs_io.c b/sys/fs/tarfs/tarfs_io.c
index 6127299b23c1..c185de8beef1 100644
--- a/sys/fs/tarfs/tarfs_io.c
+++ b/sys/fs/tarfs/tarfs_io.c
@@ -40,6 +40,12 @@
 #include <sys/uio.h>
 #include <sys/vnode.h>
 
+#if defined(ZSTDIO)
+#define TARFS_ZIO 1
+#else
+#undef TARFS_ZIO
+#endif
+
 #ifdef ZSTDIO
 #define ZSTD_STATIC_LINKING_ONLY
 #include <contrib/zstd/lib/zstd.h>
@@ -214,6 +220,7 @@ static ZSTD_customMem tarfs_zstd_mem = {
 };
 #endif
 
+#ifdef TARFS_ZIO
 /*
  * Updates the decompression frame index, recording the current input and
  * output offsets in a new index entry, and growing the index if
@@ -240,6 +247,7 @@ tarfs_zio_update_index(struct tarfs_zio *zio, off_t i, 
off_t o)
        MPASS(zio->idx[zio->curidx].i == i);
        MPASS(zio->idx[zio->curidx].o == o);
 }
+#endif
 
 /*
  * VOP_ACCESS for zio node.
@@ -600,6 +608,7 @@ static struct vop_vector tarfs_znodeops = {
 };
 VFS_VOP_VECTOR_REGISTER(tarfs_znodeops);
 
+#ifdef TARFS_ZIO
 /*
  * Initializes the decompression layer.
  */
@@ -630,6 +639,7 @@ tarfs_zio_init(struct tarfs_mount *tmp, off_t i, off_t o)
        TARFS_DPF(ZIO, "%s: created zio node\n", __func__);
        return (zio);
 }
+#endif
 
 /*
  * Initializes the I/O layer, including decompression if the signature of
@@ -640,7 +650,7 @@ int
 tarfs_io_init(struct tarfs_mount *tmp)
 {
        uint8_t *block;
-#ifdef ZSTDIO
+#ifdef TARFS_ZIO
        struct tarfs_zio *zio = NULL;
 #endif
        ssize_t res;
@@ -676,6 +686,7 @@ bad:
        return (error);
 }
 
+#ifdef TARFS_ZIO
 /*
  * Tears down the decompression layer.
  */
@@ -712,6 +723,7 @@ tarfs_zio_fini(struct tarfs_mount *tmp)
        tmp->zio = NULL;
        return (error);
 }
+#endif
 
 /*
  * Tears down the I/O layer, including the decompression layer if
@@ -722,8 +734,10 @@ tarfs_io_fini(struct tarfs_mount *tmp)
 {
        int error = 0;
 
+#ifdef TARFS_ZIO
        if (tmp->zio != NULL) {
                error = tarfs_zio_fini(tmp);
        }
+#endif
        return (error);
 }

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