From 9acedbaceec362d08a33ebfe7c4c7efcee81d094 Mon Sep 17 00:00:00 2001 From: Brian Behlendorf Date: Tue, 2 Sep 2025 09:34:08 -0700 Subject: [PATCH] config: Fix LLVM-21 -Wuninitialized-const-pointer warning LLVM-21 enables -Wuninitialized-const-pointer which results in the following compiler warning and the bdev_file_open_by_path() interface not being detected for 6.9 and newer kernels. The blk_holder_ops are not used by the ZFS code so we can safely use a NULL argument for this check. bdev_file_open_by_path/bdev_file_open_by_path.c:110:54: error: variable 'h' is uninitialized when passed as a const pointer argument here [-Werror,-Wuninitialized-const-pointer] Reviewed-by: Rob Norris Signed-off-by: Brian Behlendorf Closes #17682 Closes #17684 --- config/kernel-blkdev.m4 | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/config/kernel-blkdev.m4 b/config/kernel-blkdev.m4 index 83190c6fbe3f..02011bf39fb2 100644 --- a/config/kernel-blkdev.m4 +++ b/config/kernel-blkdev.m4 @@ -29,9 +29,8 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_GET_BY_PATH_4ARG], [ const char *path = "path"; fmode_t mode = 0; void *holder = NULL; - struct blk_holder_ops h; - bdev = blkdev_get_by_path(path, mode, holder, &h); + bdev = blkdev_get_by_path(path, mode, holder, NULL); ]) ]) @@ -48,9 +47,8 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_OPEN_BY_PATH], [ const char *path = "path"; fmode_t mode = 0; void *holder = NULL; - struct blk_holder_ops h; - bdh = bdev_open_by_path(path, mode, holder, &h); + bdh = bdev_open_by_path(path, mode, holder, NULL); ]) ]) @@ -68,9 +66,8 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_BDEV_FILE_OPEN_BY_PATH], [ const char *path = "path"; fmode_t mode = 0; void *holder = NULL; - struct blk_holder_ops h; - file = bdev_file_open_by_path(path, mode, holder, &h); + file = bdev_file_open_by_path(path, mode, holder, NULL); ]) ])