• Ingo Molnar's avatar
    perf/x86/intel/P4: Robistify P4 PMU types · 5ac2b5c2
    Ingo Molnar authored
    Linus found, while extending integer type extension checks in the
    sparse static code checker, various fragile patterns of mixed
    signed/unsigned  64-bit/32-bit integer use in perf_events_p4.c.
    
    The relevant hardware register ABI is 64 bit wide on 32-bit
    kernels as  well, so clean it all up a bit, remove unnecessary
    casts, and make sure we  use 64-bit unsigned integers in these
    places.
    
    [ Unfortunately this patch was not tested on real P4 hardware,
      those are pretty rare already. If this patch causes any
      problems on P4 hardware then please holler ... ]
    Reported-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
    Cc: David Miller <davem@davemloft.net>
    Cc: Theodore Ts'o <tytso@mit.edu>
    Cc: Oleg Nesterov <oleg@redhat.com>
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: Cyrill Gorcunov <gorcunov@gmail.com>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Link: http://lkml.kernel.org/r/20130424072630.GB1780@gmail.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    5ac2b5c2
perf_event_p4.h 26.1 KB