path: root/drivers
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authorIngo Molnar <mingo@kernel.org>2013-04-24 09:26:30 +0200
committerIngo Molnar <mingo@kernel.org>2013-04-26 09:31:41 +0200
commit5ac2b5c2721501a8f5c5e1cd4116cbc31ace6886 (patch)
tree7edd3d6f36b723c717b7cda85e92f4d4111133a8 /drivers
parent94f4db3590893c600506105b88dab581c7f6f5c8 (diff)
perf/x86/intel/P4: Robistify P4 PMU types
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: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Ingo 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.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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