Author: mjg Date: Fri Oct 13 20:31:56 2017 New Revision: 324609 URL: https://svnweb.freebsd.org/changeset/base/324609
Log: mtx: change MTX_UNOWNED from 4 to 0 The value is spread all over the kernel and zeroing a register is cheaper/shorter than setting it up to an arbitrary value. Reduces amd64 GENERIC-NODEBUG .text size by 0.4%. MFC after: 1 week Modified: head/sys/sys/mutex.h Modified: head/sys/sys/mutex.h ============================================================================== --- head/sys/sys/mutex.h Fri Oct 13 20:29:35 2017 (r324608) +++ head/sys/sys/mutex.h Fri Oct 13 20:31:56 2017 (r324609) @@ -65,15 +65,11 @@ * State bits kept in mutex->mtx_lock, for the DEFAULT lock type. None of this, * with the exception of MTX_UNOWNED, applies to spin locks. */ +#define MTX_UNOWNED 0x00000000 /* Cookie for free mutex */ #define MTX_RECURSED 0x00000001 /* lock recursed (for MTX_DEF only) */ #define MTX_CONTESTED 0x00000002 /* lock contested (for MTX_DEF only) */ -#define MTX_UNOWNED 0x00000004 /* Cookie for free mutex */ -#define MTX_FLAGMASK (MTX_RECURSED | MTX_CONTESTED | MTX_UNOWNED) - -/* - * Value stored in mutex->mtx_lock to denote a destroyed mutex. - */ -#define MTX_DESTROYED (MTX_CONTESTED | MTX_UNOWNED) +#define MTX_DESTROYED 0x00000004 /* lock destroyed */ +#define MTX_FLAGMASK (MTX_RECURSED | MTX_CONTESTED | MTX_DESTROYED) /* * Prototypes _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
