svn commit: r366201 - head/sys/sys

[Edward Tomasz Napierala]

Author: trasz
Date: Sun Sep 27 18:14:01 2020
New Revision: 366201
URL: https://svnweb.freebsd.org/changeset/base/366201

Log:
  Shrink struct sysent from 48 to 32 bytes (on LP64; on ILP32 its probably
  from 32 to 28) by shrinking some entries and reordering them.
  
  Reviewed by:	kib
  Sponsored by:	DARPA
  Differential Revision:	https://reviews.freebsd.org/D26508

Modified:
  head/sys/sys/sysent.h

Modified: head/sys/sys/sysent.h
==============================================================================
--- head/sys/sys/sysent.h	Sun Sep 27 16:15:03 2020	(r366200)
+++ head/sys/sys/sysent.h	Sun Sep 27 18:14:01 2020	(r366201)
@@ -65,14 +65,14 @@ extern bool			systrace_enabled;
 #endif /* _KERNEL */
 
 struct sysent {			/* system call table */
-	int	sy_narg;	/* number of arguments */
 	sy_call_t *sy_call;	/* implementing function */
-	au_event_t sy_auevent;	/* audit event associated with syscall */
 	systrace_args_func_t sy_systrace_args_func;
 				/* optional argument conversion function. */
+	u_int8_t sy_narg;	/* number of arguments */
+	u_int8_t sy_flags;	/* General flags for system calls. */
+	au_event_t sy_auevent;	/* audit event associated with syscall */
 	u_int32_t sy_entry;	/* DTrace entry ID for systrace. */
 	u_int32_t sy_return;	/* DTrace return ID for systrace. */
-	u_int32_t sy_flags;	/* General flags for system calls. */
 	u_int32_t sy_thrcnt;
 };