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Date: Fri, 19 Nov 2010 13:55:27 -0800 From: Greg KH <gregkh@...e.de> To: linux-kernel@...r.kernel.org, stable@...nel.org Cc: stable-review@...nel.org, torvalds@...ux-foundation.org, akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk, Paul Mackerras <paulus@...ba.org>, Benjamin Herrenschmidt <benh@...nel.crashing.org> Subject: [06/82] powerpc/perf: Fix sampling enable for PPC970 2.6.35-stable review patch. If anyone has any objections, please let us know. ------------------ From: Paul Mackerras <paulus@...ba.org> commit 9f5f9ffe50e90ed73040d2100db8bfc341cee352 upstream. The logic to distinguish marked instruction events from ordinary events on PPC970 and derivatives was flawed. The result is that instruction sampling didn't get enabled in the PMU for some marked instruction events, so they would never trigger. This fixes it by adding the appropriate break statements in the switch statement. Reported-by: David Binderman <dcb314@...mail.com> Signed-off-by: Paul Mackerras <paulus@...ba.org> Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de> --- arch/powerpc/kernel/ppc970-pmu.c | 2 ++ 1 file changed, 2 insertions(+) --- a/arch/powerpc/kernel/ppc970-pmu.c +++ b/arch/powerpc/kernel/ppc970-pmu.c @@ -169,9 +169,11 @@ static int p970_marked_instr_event(u64 e switch (unit) { case PM_VPU: mask = 0x4c; /* byte 0 bits 2,3,6 */ + break; case PM_LSU0: /* byte 2 bits 0,2,3,4,6; all of byte 1 */ mask = 0x085dff00; + break; case PM_LSU1L: mask = 0x50 << 24; /* byte 3 bits 4,6 */ break; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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