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| author |   Michael Ellerman <mpe@ellerman.id.au> | 2018-05-07 23:03:55 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-05-10 23:17:43 +1000 |
| commit | 8f2133cc0e1f9718f3e2d39b7587f4d6c9649a54 (patch) | |
| tree | 017f3ee3244ef4d37f248aa4957debb602844e48 /arch/powerpc/include/asm/trace.h | |
| parent | Revert "powerpc/powernv: Increase memory block size to 1GB on radix" (diff) | |
| download | linux-dev-8f2133cc0e1f9718f3e2d39b7587f4d6c9649a54.tar.xz linux-dev-8f2133cc0e1f9718f3e2d39b7587f4d6c9649a54.zip | |
powerpc/pseries: hcall_exit tracepoint retval should be signed
The hcall_exit() tracepoint has retval defined as unsigned long. That
leads to humours results like:
bash-3686 [009] d..2 854.134094: hcall_entry: opcode=24
bash-3686 [009] d..2 854.134095: hcall_exit: opcode=24 retval=18446744073709551609
It's normal for some hcalls to return negative values, displaying them
as unsigned isn't very helpful. So change it to signed.
bash-3711 [001] d..2 471.691008: hcall_entry: opcode=24
bash-3711 [001] d..2 471.691008: hcall_exit: opcode=24 retval=-7
Which can be more easily compared to H_NOT_FOUND in hvcall.h
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Diffstat (limited to 'arch/powerpc/include/asm/trace.h')
| -rw-r--r-- | arch/powerpc/include/asm/trace.h | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/powerpc/include/asm/trace.h b/arch/powerpc/include/asm/trace.h index 33f3b479138b..d018e8602694 100644 --- a/arch/powerpc/include/asm/trace.h +++ b/arch/powerpc/include/asm/trace.h @@ -81,8 +81,7 @@ TRACE_EVENT_FN_COND(hcall_entry, TRACE_EVENT_FN_COND(hcall_exit, - TP_PROTO(unsigned long opcode, unsigned long retval, - unsigned long *retbuf), + TP_PROTO(unsigned long opcode, long retval, unsigned long *retbuf), TP_ARGS(opcode, retval, retbuf), @@ -90,7 +89,7 @@ TRACE_EVENT_FN_COND(hcall_exit, TP_STRUCT__entry( __field(unsigned long, opcode) - __field(unsigned long, retval) + __field(long, retval) ), TP_fast_assign( @@ -98,7 +97,7 @@ TRACE_EVENT_FN_COND(hcall_exit, __entry->retval = retval; ), - TP_printk("opcode=%lu retval=%lu", __entry->opcode, __entry->retval), + TP_printk("opcode=%lu retval=%ld", __entry->opcode, __entry->retval), hcall_tracepoint_regfunc, hcall_tracepoint_unregfunc ); |