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From: Roman Divacky <rdivacky@FreeBSD.org>
Date: Mon, 9 Nov 2009 20:29:10 +0000 (UTC)
To: cvs-src-old@freebsd.org
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Subject: cvs commit: src/sys/amd64/isa isa_dma.c src/sys/dev/fdc fdc.c
 src/sys/dev/ieee488 ibfoo.c src/sys/i386/isa isa_dma.c
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rdivacky    2009-11-09 20:29:10 UTC

  FreeBSD src repository

  Modified files:
    sys/amd64/isa        isa_dma.c 
    sys/dev/fdc          fdc.c 
    sys/dev/ieee488      ibfoo.c 
    sys/i386/isa         isa_dma.c 
  Log:
  SVN rev 199104 on 2009-11-09 20:29:10Z by rdivacky
  
  Make isa_dma functions MPSAFE by introducing its own private lock. These
  functions are selfcontained (ie. they touch only isa_dma.c static variables
  and hardware) so a private lock is sufficient to prevent races. This changes
  only i386/amd64 while there are also isa_dma functions for ia64/sparc64.
  Sparc64 are ones empty stubs and ia64 ones are unused as ia64 does not
  have isa (says marcel).
  
  This patch removes explicit locking of Giant from a few drivers (there
  are some that requires this but lack ones - this patch fixes this) and
  also removes the need for implicit locking of Giant from attach routines
  where it's provided by newbus.
  
  Approved by:    ed (mentor, implicit)
  Reviewed by:    jhb, attilio (glanced by)
  Tested by:      Giovanni Trematerra <giovanni.trematerra gmail com>
  IA64 clue:      marcel
  
  Revision  Changes    Path
  1.23      +83 -27    src/sys/amd64/isa/isa_dma.c
  1.326     +0 -6      src/sys/dev/fdc/fdc.c
  1.7       +0 -8      src/sys/dev/ieee488/ibfoo.c
  1.20      +83 -27    src/sys/i386/isa/isa_dma.c