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authorDavid Mosberger-Tang <davidm@hpl.hp.com>2005-05-04 13:25:00 -0700
committerTony Luck <tony.luck@intel.com>2005-06-28 09:28:16 -0700
commit458f935527372499b714bf4f8e646a68bb0f52e3 (patch)
treebab3265d60b3c7c3f898eeefa6c9dac264d41195 /arch/sparc64/defconfig
parente15da40176f16050c8d92b36387a49370317e276 (diff)
[IA64] Speed up lfetch.fault [NULL]
This patch greatly speeds up the handling of lfetch.fault instructions which result in NaT consumption. Due to the NaT-page mapped at address 0, this is guaranteed to happen when lfetch.fault'ing a NULL pointer. With this patch in place, we can even define prefetch()/prefetchw() as lfetch.fault without significant performance degradation. More importantly, it allows compilers to be more aggressive with using lfetch.fault on pointers that might be NULL. Signed-off-by: David Mosberger-Tang <davidm@hpl.hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/sparc64/defconfig')
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