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Use __get_free_pages() for emergency objects

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The __get_free_pages() function must be used in place of kmalloc()
to ensure the __GFP_COMP is strictly honored.  This is due to
kmalloc() being layered on the generic Linux slab caches.  It
wasn't until recently that all caches were created using __GFP_COMP.
This means that it is possible for a kmalloc() which passed the
__GFP_COMP flag to be returned a non-compound allocation.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Brian Behlendorf
2015-01-15 15:11:45 -08:00
parent 436ad60faa
commit ee33517452
2 changed files with 13 additions and 11 deletions
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include/sys/kmem_cache.h
+1 -1
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@@ -163,7 +163,7 @@ typedef struct spl_kmem_alloc {
typedef struct spl_kmem_emergency {
struct rb_node ske_node; /* Emergency tree linkage */
void *ske_obj; /* Buffer address */
unsigned long ske_obj; /* Buffer address */
} spl_kmem_emergency_t;
typedef struct spl_kmem_cache {