mirror_zfs/include
Alejandro Colomar db7f1a91de
Use _Noreturn (C11; GNU89) properly
A function that returns with no value is a different thing from a
function that doesn't return at all.  Those are two orthogonal
concepts, commonly confused.

pthread_create(3) expects a pointer to a start routine that has a
very precise prototype:

    void *(*start_routine)(void *);

However, other thread functions, such as kernel ones, expect:

    void (*start_routine)(void *);

Providing a different one is incorrect, and has only been working
because the ABIs happen to produce a compatible function.

We should use '_Noreturn void', since it's the natural type, and
then provide a '_Noreturn void *' wrapper for pthread functions.

For consistency, replace most cases of __NORETURN or
__attribute__((noreturn)) by _Noreturn.  _Noreturn is understood
by -std=gnu89, so it should be safe to use everywhere.

Ref: https://github.com/openzfs/zfs/pull/13110#discussion_r808450136
Ref: https://software.codidact.com/posts/285972
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Co-authored-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Closes #13120
2022-03-04 16:25:22 -08:00
..
os Use _Noreturn (C11; GNU89) properly 2022-03-04 16:25:22 -08:00
sys Use _Noreturn (C11; GNU89) properly 2022-03-04 16:25:22 -08:00
.gitignore OpenZFS restructuring - move platform specific sources 2019-09-06 11:26:26 -07:00
cityhash.h libzfs: convert to -fvisibility=hidden 2021-06-03 13:17:55 -07:00
libnvpair.h lib{efi,avl,share,tpool,zfs_core,zfsbootenv,zutil}: -fvisibility=hidden 2021-06-09 17:04:32 -07:00
libuutil_common.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
libuutil_impl.h Replace /*PRINTFLIKEn*/ with attribute(printf) 2021-07-26 12:07:15 -07:00
libuutil.h Use _Noreturn (C11; GNU89) properly 2022-03-04 16:25:22 -08:00
libzfs_core.h Vdev Properties Feature 2021-11-30 07:46:25 -07:00
libzfs.h libzfs: const correctness 2022-02-01 16:56:18 -08:00
libzfsbootenv.h lib{efi,avl,share,tpool,zfs_core,zfsbootenv,zutil}: -fvisibility=hidden 2021-06-09 17:04:32 -07:00
libzutil.h Simplify and document OpenZFS library dependencies 2021-10-07 11:31:26 -06:00
Makefile.am libzfs: don't distribute libzfs_impl.h 2021-06-03 13:17:35 -07:00
thread_pool.h lib{efi,avl,share,tpool,zfs_core,zfsbootenv,zutil}: -fvisibility=hidden 2021-06-09 17:04:32 -07:00
zfeature_common.h log xattr=sa create/remove/update to ZIL 2022-02-22 13:06:43 -08:00
zfs_comutil.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
zfs_deleg.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
zfs_fletcher.h Add --enable-asan and --enable-ubsan switches 2022-02-03 14:35:38 -08:00
zfs_namecheck.h libzfs: convert to -fvisibility=hidden 2021-06-03 13:17:55 -07:00
zfs_prop.h Flex non-pretty-printed properties and raw-/pretty-print remaining ones 2022-03-04 12:08:33 -08:00