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authorLu Baolu <baolu.lu@linux.intel.com>2017-03-21 16:01:29 +0800
committerIngo Molnar <mingo@kernel.org>2017-03-21 12:28:45 +0100
commitdd759d93f4dd4fd2f345a78ad1223bb3edf3ee7b (patch)
tree958cf26fd6ad3b034f345ebdb441c590a141aea0 /drivers/usb
parent97da3854c526d3a6ee05c849c96e48d21527606c (diff)
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x86/timers: Add simple udelay calibration
Add a simple udelay calibration in x86 architecture-specific boot-time initializations. This will get a workable estimate for loops_per_jiffy. Hence, udelay() could be used after this initialization. Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mathias Nyman <mathias.nyman@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linux-usb@vger.kernel.org Link: http://lkml.kernel.org/r/1490083293-3792-2-git-send-email-baolu.lu@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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