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Merge r7426 from trunk

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git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/3.3.x@7679 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2018-11-04 04:13:35 +00:00
parent 0072cdc6b5
commit 6a80615add
1 changed files with 19 additions and 1 deletions
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20
scst/src/scst_main.c
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@@ -2579,6 +2579,24 @@ static int __init init_scst(void)
(p); \
})
/*
* Used for structures with fast path write access accessed from user space.
* See also commit 8eb8284b4129 ("usercopy: Prepare for usercopy whitelisting").
*/
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 16, 0)
#define INIT_CACHEP_ALIGN_USERCOPY(p, s) ({ \
(p) = kmem_cache_create_usercopy(#s, sizeof(struct s), \
__alignof__(struct s), \
SCST_SLAB_FLAGS | SLAB_HWCACHE_ALIGN, \
0, sizeof(struct s), NULL); \
TRACE_MEM("Slab create: %s at %p size %zd", #s, (p), \
sizeof(struct s)); \
(p); \
})
#else
#define INIT_CACHEP_ALIGN_USERCOPY(p, s) INIT_CACHEP_ALIGN(p, s)
#endif
res = -ENOMEM;
if (!INIT_CACHEP(scst_mgmt_cachep, scst_mgmt_cmd))
goto out_lib_exit;
@@ -2593,7 +2611,7 @@ static int __init init_scst(void)
}
if (!INIT_CACHEP(scst_aen_cachep, scst_aen)) /* read-mostly */
goto out_destroy_sense_cache;
if (!INIT_CACHEP_ALIGN(scst_cmd_cachep, scst_cmd))
if (!INIT_CACHEP_ALIGN_USERCOPY(scst_cmd_cachep, scst_cmd))
goto out_destroy_aen_cache;
#ifdef CONFIG_SCST_MEASURE_LATENCY
if (!INIT_CACHEP_ALIGN(scst_sess_cachep, scst_session))