tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
staging-next
head: 26a5e9b834a647b9d4dfbeef8b42f201cb3293ae
commit: 85b6542bbade42935386661cb45d90c4e13766b7 [575/620] staging: lustre:
llite: remove redundant lookup in dump_pgcache
smatch warnings:
drivers/staging/lustre/lustre/llite/vvp_dev.c:487 vvp_pgcache_find() warn:
always true condition '(vmpage->index <= 4294967295) => (0-u32max <= u32max)'
vim +487 drivers/staging/lustre/lustre/llite/vvp_dev.c
461
462 static struct page *vvp_pgcache_find(const struct lu_env *env,
463 struct lu_device *dev,
464 struct cl_object **clobp, loff_t
*pos)
465 {
466 struct cl_object *clob;
467 struct lu_site *site;
468 struct vvp_pgcache_id id;
469
470 site = dev->ld_site;
471 vvp_pgcache_id_unpack(*pos, &id);
472
473 while (1) {
474 if (id.vpi_bucket >= CFS_HASH_NHLIST(site->ls_obj_hash))
475 return NULL;
476 clob = vvp_pgcache_obj(env, dev, &id);
477 if (clob) {
478 struct inode *inode = vvp_object_inode(clob);
479 struct page *vmpage;
480 int nr;
481
482 nr = find_get_pages_contig(inode->i_mapping,
483 id.vpi_index, 1,
&vmpage);
484 if (nr > 0) {
485 id.vpi_index = vmpage->index;
486 /* Cant support over 16T file */
> 487 if (vmpage->index <= 0xffffffff) {
488 *clobp = clob;
489 *pos = vvp_pgcache_id_pack(&id);
490 return vmpage;
491 }
492 put_page(vmpage);
493 }
494
495 lu_object_ref_del(&clob->co_lu, "dump",
current);
496 cl_object_put(env, clob);
497 }
498 /* to the next object. */
499 ++id.vpi_depth;
500 id.vpi_depth &= 0xf;
501 if (id.vpi_depth == 0 && ++id.vpi_bucket == 0)
502 return NULL;
503 id.vpi_index = 0;
504 }
505 }
506
---
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