Messages in this thread | | | Date | Sun, 20 Jan 2013 13:45:54 -0600 | From | Shaun Ruffell <> | Subject | Re: [PATCH] x86/perf_events: Fix "section type conflict" build error. |
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Bump. Still an issue with v3.8-rc4. Am I mistaken in thinking this patch is trivial and obviously correct?
Thanks, Shaun
On Wed, Jan 09, 2013 at 03:59:42PM -0600, Shaun Ruffell wrote: > From: Jan Beulich <JBeulich@suse.com> > > This patch fixes a build regression first introduced in 3.7 with > (e09df47 "perf/x86: Update/fix generic events on P6 PMU"). > > At least some older versions of gcc, like (GCC) 4.1.2 20080704 (Red Hat > 4.1.2-51), dislike mixing constant and non-const data in the same > section. Without this patch a build will fail with the following error: > > CC arch/x86/kernel/cpu/perf_event_p6.o > arch/x86/kernel/cpu/perf_event_p6.c:22: error: p6_hw_cache_event_ids causes a section type conflict > make[3]: *** [arch/x86/kernel/cpu/perf_event_p6.o] Error 1 > > Newer versions of gcc simply emits the section as writable (which isn't what > we want, but also is not a big problem as it gets discarded post-init anyway). > > Also get the Knight's Corner definitions in sync. > > Signed-off-by: Jan Beulich <jbeulich@suse.com> > Cc: stable@vger.kernel.org # 3.7.x only > [sruffell@digium.com: Added details to the commit message.] > Signed-off-by: Shaun Ruffell <sruffell@digium.com> > > --- > > [I had the wrong stable email address when I previously sent this. > Sorry about the extra noise.] > > Hans, Thomas, > > Any chance of picking this up for 3.8? This doesn't seem too > controversial since it only makes sure that data in the __initconst > section is const. > > Rob Landley also reported this to the list here: > https://lkml.org/lkml/2012/12/14/511. > > Thanks, > Shaun > > arch/x86/kernel/cpu/perf_event_knc.c | 4 ++-- > arch/x86/kernel/cpu/perf_event_p6.c | 2 +- > 2 files changed, 3 insertions(+), 3 deletions(-) > > diff --git a/arch/x86/kernel/cpu/perf_event_knc.c b/arch/x86/kernel/cpu/perf_event_knc.c > index 4b7731b..838fa87 100644 > --- a/arch/x86/kernel/cpu/perf_event_knc.c > +++ b/arch/x86/kernel/cpu/perf_event_knc.c > @@ -17,7 +17,7 @@ static const u64 knc_perfmon_event_map[] = > [PERF_COUNT_HW_BRANCH_MISSES] = 0x002b, > }; > > -static __initconst u64 knc_hw_cache_event_ids > +static const u64 __initconst knc_hw_cache_event_ids > [PERF_COUNT_HW_CACHE_MAX] > [PERF_COUNT_HW_CACHE_OP_MAX] > [PERF_COUNT_HW_CACHE_RESULT_MAX] = > @@ -284,7 +284,7 @@ static struct attribute *intel_knc_formats_attr[] = { > NULL, > }; > > -static __initconst struct x86_pmu knc_pmu = { > +static const struct x86_pmu knc_pmu __initconst = { > .name = "knc", > .handle_irq = knc_pmu_handle_irq, > .disable_all = knc_pmu_disable_all, > diff --git a/arch/x86/kernel/cpu/perf_event_p6.c b/arch/x86/kernel/cpu/perf_event_p6.c > index f2af39f..b1e2fe1 100644 > --- a/arch/x86/kernel/cpu/perf_event_p6.c > +++ b/arch/x86/kernel/cpu/perf_event_p6.c > @@ -19,7 +19,7 @@ static const u64 p6_perfmon_event_map[] = > > }; > > -static __initconst u64 p6_hw_cache_event_ids > +static const u64 __initconst p6_hw_cache_event_ids > [PERF_COUNT_HW_CACHE_MAX] > [PERF_COUNT_HW_CACHE_OP_MAX] > [PERF_COUNT_HW_CACHE_RESULT_MAX] = > -- > 1.8.1
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