Move GFP flags kernel compatibility code

Move the GFP flags kernel compat code from c file to kmem header.

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Michael Niewöhner <[email protected]>
Closes #10424

Author: c0d3z3r0

include/os/linux/spl/sys/kmem.h

@@ -144,6 +144,18 @@ __spl_pf_fstrans_check(void)
 	return (current->flags & __SPL_PF_FSTRANS);
 }
 
+/*
+ * Kernel compatibility for GFP flags
+ */
+/* < 4.13 */
+#ifndef __GFP_RETRY_MAYFAIL
+#define	__GFP_RETRY_MAYFAIL	__GFP_REPEAT
+#endif
+/* < 4.4 */
+#ifndef __GFP_RECLAIM
+#define	__GFP_RECLAIM		__GFP_WAIT
+#endif
+
 #ifdef HAVE_ATOMIC64_T
 #define	kmem_alloc_used_add(size)	atomic64_add(size, &kmem_alloc_used)
 #define	kmem_alloc_used_sub(size)	atomic64_sub(size, &kmem_alloc_used)

module/os/linux/spl/spl-kmem.c

@@ -132,15 +132,6 @@ kmem_strfree(char *str)
 }
 EXPORT_SYMBOL(kmem_strfree);
 
-/* Kernel compatibility for <4.13 */
-#ifndef __GFP_RETRY_MAYFAIL
-#define	__GFP_RETRY_MAYFAIL	__GFP_REPEAT
-#endif
-/* Kernel compatibility for <4.4 */
-#ifndef __GFP_RECLAIM
-#define	__GFP_RECLAIM		__GFP_WAIT
-#endif
-
 void *
 spl_kvmalloc(size_t size, gfp_t lflags)
 {