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Description
System information
| Type | Version/Name |
|---|---|
| Distribution Name | Arch Linux |
| Distribution Version | |
| Kernel Version | 6.11.3 |
| Architecture | x86_64 |
| OpenZFS Version | 2.3.0-rc2 |
Describe the problem you're observing
When building the linux kernel using clang and with zfs bult-in, there are many warnings relating to type redefinitions and casts. These don't cause build errors, everything functions fine, but kernel builds are best when they are quiet.
Include any warning/errors/backtraces from the system logs
These patterns of type redefinition involving kstat_t and abd_t appear in many files, one example:
In file included from fs/zfs/zfs/dmu_object.c:27:
In file included from ./include/zfs/sys/dbuf.h:31:
In file included from ./include/zfs/sys/dmu.h:46:
In file included from ./include/zfs/sys/zfs_context.h:64:
./include/zfs/os/linux/spl/sys/kstat.h:82:24: warning: redefinition of typedef 'kstat_t' is a C11 feature [-Wtypedef-redefinition]
82 | typedef struct kstat_s kstat_t;
| ^
./include/zfs/os/linux/spl/sys/taskq.h:42:24: note: previous definition is here
42 | typedef struct kstat_s kstat_t;
| ^
In file included from fs/zfs/zfs/dmu_object.c:27:
In file included from ./include/zfs/sys/dbuf.h:31:
In file included from ./include/zfs/sys/dmu.h:50:
In file included from ./include/zfs/sys/zio_compress.h:34:
./include/zfs/sys/abd.h:68:3: warning: redefinition of typedef 'abd_t' is a C11 feature [-Wtypedef-redefinition]
68 | } abd_t;
| ^
./include/zfs/os/linux/zfs/sys/abd_os.h:44:20: note: previous definition is here
44 | typedef struct abd abd_t;
| ^
This pattern of casting appears in many files, one example:
fs/zfs/zfs/spa.c:9200:27: warning: cast from 'void (*)(void *) __attribute__((noreturn))' to 'thread_func_t' (aka 'void (*)(void *)') converts to incompatible function type [-Wcast-function-type-strict]
9200 | spa->spa_async_thread = thread_create(NULL, 0,
| ^~~~~~~~~~~~~~~~~~~~~~
9201 | spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./include/zfs/os/linux/spl/sys/thread.h:53:32: note: expanded from macro 'thread_create'
53 | __thread_create(stk, stksize, (thread_func_t)func, #func, \
| ^~~~~~~~~~~~~~~~~~~