Author: kib
Date: Sat Aug 25 15:31:23 2018
New Revision: 338313
URL: https://svnweb.freebsd.org/changeset/base/338313

Log:
  Remove dead code in i386 cpu_throw().
  
  Curpmap must be already valid when cpu_throw() is called, even for early
  AP startup.
  
  Suggested by: alc
  Reviewed by:  alc, markj
  Sponsored by: The FreeBSD Foundation
  Approved by:  re (marius)
  MFC after:    1 week
  Differential revision:        https://reviews.freebsd.org/D16893

Modified:
  head/sys/i386/i386/swtch.s

Modified: head/sys/i386/i386/swtch.s
==============================================================================
--- head/sys/i386/i386/swtch.s  Sat Aug 25 15:21:28 2018        (r338312)
+++ head/sys/i386/i386/swtch.s  Sat Aug 25 15:31:23 2018        (r338313)
@@ -74,16 +74,12 @@
  */
 ENTRY(cpu_throw)
        movl    PCPU(CPUID), %esi
-       movl    4(%esp),%ecx                    /* Old thread */
-       testl   %ecx,%ecx                       /* no thread? */
-       jz      1f
        /* release bit from old pm_active */
        movl    PCPU(CURPMAP), %ebx
 #ifdef SMP
        lock
 #endif
        btrl    %esi, PM_ACTIVE(%ebx)           /* clear old */
-1:
        movl    8(%esp),%ecx                    /* New thread */
        movl    TD_PCB(%ecx),%edx
        /* set bit in new pm_active */
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