[LU-17421] Lustre master build failure with ZFS 2.2.1

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0
• Severity: 3
• Assignee: Brian Atkinson
• Reporter: Brian Atkinson

Description

ZFS 2.2.1 unified the code for arc_prune_async() for both FreeBSD and Linux. As a side effect of this update, the first parameter for the arc_prune_func_t function pointer typedef was changed to an uint64_t. Lustre master fails to build with ZFS 2.2.1 with the following error:

CC [M]  /home/brian/lustre/lustre/osd-zfs/osd_handler.o

/home/brian/lustre/lustre/osd-zfs/osd_handler.c: In function ‘osd_objset_register_callbacks’:

/home/brian/lustre/lustre/osd-zfs/osd_handler.c:915:43: error: passing argument 1 of ‘arc_add_prune_callback’ from incompatible pointer type [-Werror=incompatible-pointer-types]

  o->arc_prune_cb = arc_add_prune_callback(arc_prune_func, o); 

                                           ^~~~~~~~~~~~~~

In file included from /home/brian/lustre/lustre/osd-zfs/osd_internal.h:51,

                 from /home/brian/lustre/lustre/osd-zfs/osd_handler.c:51:

/usr/src/zfs-2.2.1/include/sys/arc.h:310:14: note: expected ‘void (uint64_t,  void *)’

{aka ‘void (*)(long long unsigned int,  void *)’}

but argument is of type ‘void (int64_t,  void *)’

{aka ‘void (*)(long long int,  void *)’}

 arc_prune_t *arc_add_prune_callback(arc_prune_func_t *func, void *priv);

              ^~~~~~~~~~~~~~~~~~~~~~