mm/iob: limit the alignment length of IOB to no less than sizeof(uinptr_t)

avoid crashes caused by four-byte alignment issues.

Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>

include/nuttx/mm/iob.h

@@ -31,6 +31,7 @@
 
 #include <stdint.h>
 #include <stdbool.h>
+#include <sys/param.h>
 
 #ifdef CONFIG_IOB_NOTIFIER
 #  include <nuttx/wqueue.h>
@@ -74,9 +75,7 @@
 
 /* Default config of alignment and head padding size */
 
-#if !defined(CONFIG_IOB_ALIGNMENT)
-#  define CONFIG_IOB_ALIGNMENT      1
-#endif
+#define IOB_ALIGNMENT    MAX(CONFIG_IOB_ALIGNMENT, sizeof(uintptr_t))
 
 /* IOB helpers */
 

include/nuttx/sched.h

@@ -46,7 +46,6 @@
 #include <nuttx/queue.h>
 #include <nuttx/wdog.h>
 #include <nuttx/fs/fs.h>
-#include <nuttx/net/net.h>
 #include <nuttx/mm/map.h>
 #include <nuttx/tls.h>
 #include <nuttx/spinlock_type.h>