Move linux qsort def to platform header

Moving qsort to the platform header allows each platform to
provide an appropriate sorting implementation.

Reviewed-by: Allan Jude <allanjude@freebsd.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes #9663

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

@@ -192,7 +192,11 @@ extern void spl_cleanup(void);
 #define	SET_ERROR(err) \
 	(__set_error(__FILE__, __func__, __LINE__, err), err)
 
-#if defined(_KERNEL) && !defined(_KMEMUSER) && !defined(offsetof)
+#include <linux/sort.h>
+#define	qsort(base, num, size, cmp)		\
+	sort(base, num, size, cmp, NULL)
+
+#if !defined(_KMEMUSER) && !defined(offsetof)
 
 /* avoid any possibility of clashing with <stddef.h> version */
 

module/lua/ltablib.c

@@ -244,7 +244,7 @@ static void auxsort (lua_State *L, int l, int u) {
   }  /* repeat the routine for the larger one */
 }
 
-static int sort (lua_State *L) {
+static int tsort (lua_State *L) {
   int n = aux_getn(L, 1);
   luaL_checkstack(L, 40, "");  /* assume array is smaller than 2^40 */
   if (!lua_isnoneornil(L, 2))  /* is there a 2nd argument? */
@@ -266,7 +266,7 @@ static const luaL_Reg tab_funcs[] = {
   {"pack", pack},
   {"unpack", unpack},
   {"remove", tremove},
-  {"sort", sort},
+  {"sort", tsort},
   {NULL, NULL}
 };
 

module/zcommon/zprop_common.c

@@ -41,11 +41,7 @@
 #include "zfs_prop.h"
 #include "zfs_deleg.h"
 
-#if defined(_KERNEL)
-#include <linux/sort.h>
-#define	qsort(base, num, size, cmp) \
-    sort(base, num, size, cmp, NULL)
-#else
+#if !defined(_KERNEL)
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>