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uipc_shm: silent warnings about write-only variables in largepage code

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In shm_largepage_phys_populate(), the result from vm_page_grab() is only
needed for assertion.

In shm_dotruncate_largepage(), there is a commented-out prototype code
for managed largepages.   The oldobjsz is saved for its sake, so mark
the variable as __unused directly.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2021-10-21 20:46:36 +03:00
parent 3d2778515a
commit 3b5331dd8d
1 changed files with 3 additions and 2 deletions
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5
sys/kern/uipc_shm.c
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@ -267,7 +267,7 @@ static int
shm_largepage_phys_populate(vm_object_t object, vm_pindex_t pidx,
int fault_type, vm_prot_t max_prot, vm_pindex_t *first, vm_pindex_t *last)
{
vm_page_t m;
vm_page_t m __diagused;
int psind;
psind = object->un_pager.phys.data_val;
@ -751,7 +751,8 @@ shm_dotruncate_largepage(struct shmfd *shmfd, off_t length, void *rl_cookie)
{
vm_object_t object;
vm_page_t m;
vm_pindex_t newobjsz, oldobjsz;
vm_pindex_t newobjsz;
vm_pindex_t oldobjsz __unused;
int aflags, error, i, psind, try;
KASSERT(length >= 0, ("shm_dotruncate: length < 0"));