Date: Sat, 13 Jun 2009 13:56:06 +0000 (UTC) From: Ed Schouten <ed@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r194110 - head/sys/i386/include Message-ID: <200906131356.n5DDu6bT015673@svn.freebsd.org>
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Author: ed Date: Sat Jun 13 13:56:06 2009 New Revision: 194110 URL: http://svn.freebsd.org/changeset/base/194110 Log: Simplify the inline assembler (and correct potential error) of pte_load_store(). Submitted by: Christoph Mallon Modified: head/sys/i386/include/pmap.h Modified: head/sys/i386/include/pmap.h ============================================================================== --- head/sys/i386/include/pmap.h Sat Jun 13 13:54:03 2009 (r194109) +++ head/sys/i386/include/pmap.h Sat Jun 13 13:56:06 2009 (r194110) @@ -362,15 +362,8 @@ pte_load(pt_entry_t *ptep) static __inline pt_entry_t pte_load_store(pt_entry_t *ptep, pt_entry_t pte) { - pt_entry_t r; - - __asm __volatile( - "xchgl %0,%1" - : "=m" (*ptep), - "=r" (r) - : "1" (pte), - "m" (*ptep)); - return (r); + __asm volatile("xchgl %0, %1" : "+m" (*ptep), "+r" (pte)); + return (pte); } #define pte_load_clear(pte) atomic_readandclear_int(pte)
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