)]}'
{
  "commit": "df013ffb8119c89f062ab05b7f544704315db47b",
  "tree": "db87f30545d2fd6cf9b0a547f09d924df3be90dd",
  "parents": [
    "9fb0bfe1408d5506b7b83d13d1eed573fd71d67d"
  ],
  "author": {
    "name": "Huang Ying",
    "email": "ying.huang@intel.com",
    "time": "Wed Jul 13 13:14:22 2011 +0800"
  },
  "committer": {
    "name": "Len Brown",
    "email": "len.brown@intel.com",
    "time": "Wed Aug 03 11:12:37 2011 -0400"
  },
  "message": "Add Kconfig option ARCH_HAVE_NMI_SAFE_CMPXCHG\n\ncmpxchg() is widely used by lockless code, including NMI-safe lockless\ncode.  But on some architectures, the cmpxchg() implementation is not\nNMI-safe, on these architectures the lockless code may need a\nspin_trylock_irqsave() based implementation.\n\nThis patch adds a Kconfig option: ARCH_HAVE_NMI_SAFE_CMPXCHG, so that\nNMI-safe lockless code can depend on it or provide different\nimplementation according to it.\n\nOn many architectures, cmpxchg is only NMI-safe for several specific\noperand sizes. So, ARCH_HAVE_NMI_SAFE_CMPXCHG define in this patch\nonly guarantees cmpxchg is NMI-safe for sizeof(unsigned long).\n\nSigned-off-by: Huang Ying \u003cying.huang@intel.com\u003e\nAcked-by: Mike Frysinger \u003cvapier@gentoo.org\u003e\nAcked-by: Paul Mundt \u003clethal@linux-sh.org\u003e\nAcked-by: Hans-Christian Egtvedt \u003chans-christian.egtvedt@atmel.com\u003e\nAcked-by: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nAcked-by: Chris Metcalf \u003ccmetcalf@tilera.com\u003e\nAcked-by: Richard Henderson \u003crth@twiddle.net\u003e\nCC: Mikael Starvik \u003cstarvik@axis.com\u003e\nAcked-by: David Howells \u003cdhowells@redhat.com\u003e\nCC: Yoshinori Sato \u003cysato@users.sourceforge.jp\u003e\nCC: Tony Luck \u003ctony.luck@intel.com\u003e\nCC: Hirokazu Takata \u003ctakata@linux-m32r.org\u003e\nCC: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCC: Michal Simek \u003cmonstr@monstr.eu\u003e\nAcked-by: Ralf Baechle \u003cralf@linux-mips.org\u003e\nCC: Kyle McMartin \u003ckyle@mcmartin.ca\u003e\nCC: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCC: Chen Liqin \u003cliqin.chen@sunplusct.com\u003e\nCC: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nCC: Ingo Molnar \u003cmingo@redhat.com\u003e\nCC: Chris Zankel \u003cchris@zankel.net\u003e\nSigned-off-by: Len Brown \u003clen.brown@intel.com\u003e\n",
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