[PATCH 2/2] ia64: fast syscall args fetching in utrace probe

[Masami Hiramatsu]

Hi,

Here is a patch which add fast syscall args fetching by using unwaddr
cache in a utrace handler on ia64.
Since syscall args can not be retrieved directly from pt_regs,
we need to unwind the register stack. This patch speeds the unwinding
up by caching unwound address in a probe handler (as same as
__ia64_fetch_register()).

Thank you,

-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America) Inc.
Software Solutions Division

e-mail: mhiramat@redhat.com

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