* [PATCH] perf: fix building warning on ARM 32. @ 2014-12-16 2:10 Wang Nan 2014-12-16 4:49 ` Namhyung Kim 0 siblings, 1 reply; 3+ messages in thread From: Wang Nan @ 2014-12-16 2:10 UTC (permalink / raw) To: a.p.zijlstra, paulus, mingo, acme, ak, namhyung; +Cc: lizefan, linux-kernel Commit 85c116a6c introduces asprintf() call and matches '%ld' to a u64 argument, which is incorrect on ARM. CC /home/wn/util/srcline.o util/srcline.c: In function 'get_srcline': util/srcline.c:297:6: error: format '%ld' expects argument of type 'long int', but argument 4 has type 'u64' [-Werror=format] cc1: all warnings being treated as errors make[1]: *** [/home/wn/util/srcline.o] Error 1 Signed-off-by: Wang Nan <wangnan0@huawei.com> --- tools/perf/util/srcline.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c index e73b6a5..42cb642 100644 --- a/tools/perf/util/srcline.c +++ b/tools/perf/util/srcline.c @@ -294,7 +294,7 @@ out: } if (sym) { if (asprintf(&srcline, "%s+%ld", show_sym ? sym->name : "", - addr - sym->start) < 0) + (long int)(addr - sym->start)) < 0) return SRCLINE_UNKNOWN; } else if (asprintf(&srcline, "%s[%lx]", dso->short_name, addr) < 0) return SRCLINE_UNKNOWN; -- 1.8.4 ^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] perf: fix building warning on ARM 32. 2014-12-16 2:10 [PATCH] perf: fix building warning on ARM 32 Wang Nan @ 2014-12-16 4:49 ` Namhyung Kim 2014-12-16 5:47 ` Wang Nan 0 siblings, 1 reply; 3+ messages in thread From: Namhyung Kim @ 2014-12-16 4:49 UTC (permalink / raw) To: Wang Nan; +Cc: a.p.zijlstra, paulus, mingo, acme, ak, lizefan, linux-kernel Hi Wang, On Tue, Dec 16, 2014 at 10:10:10AM +0800, Wang Nan wrote: > Commit 85c116a6c introduces asprintf() call and matches '%ld' to a u64 > argument, which is incorrect on ARM. > > CC /home/wn/util/srcline.o > util/srcline.c: In function 'get_srcline': > util/srcline.c:297:6: error: format '%ld' expects argument of type 'long int', but argument 4 has type 'u64' [-Werror=format] > cc1: all warnings being treated as errors > make[1]: *** [/home/wn/util/srcline.o] Error 1 Hmm.. shouldn't it be %PRIu64 instead? Thanks, Namhyung > > Signed-off-by: Wang Nan <wangnan0@huawei.com> > --- > tools/perf/util/srcline.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c > index e73b6a5..42cb642 100644 > --- a/tools/perf/util/srcline.c > +++ b/tools/perf/util/srcline.c > @@ -294,7 +294,7 @@ out: > } > if (sym) { > if (asprintf(&srcline, "%s+%ld", show_sym ? sym->name : "", > - addr - sym->start) < 0) > + (long int)(addr - sym->start)) < 0) > return SRCLINE_UNKNOWN; > } else if (asprintf(&srcline, "%s[%lx]", dso->short_name, addr) < 0) > return SRCLINE_UNKNOWN; > -- > 1.8.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] perf: fix building warning on ARM 32. 2014-12-16 4:49 ` Namhyung Kim @ 2014-12-16 5:47 ` Wang Nan 0 siblings, 0 replies; 3+ messages in thread From: Wang Nan @ 2014-12-16 5:47 UTC (permalink / raw) To: Namhyung Kim; +Cc: a.p.zijlstra, paulus, mingo, acme, ak, lizefan, linux-kernel On 2014/12/16 12:49, Namhyung Kim wrote: > Hi Wang, > > On Tue, Dec 16, 2014 at 10:10:10AM +0800, Wang Nan wrote: >> Commit 85c116a6c introduces asprintf() call and matches '%ld' to a u64 >> argument, which is incorrect on ARM. >> >> CC /home/wn/util/srcline.o >> util/srcline.c: In function 'get_srcline': >> util/srcline.c:297:6: error: format '%ld' expects argument of type 'long int', but argument 4 has type 'u64' [-Werror=format] >> cc1: all warnings being treated as errors >> make[1]: *** [/home/wn/util/srcline.o] Error 1 > > Hmm.. shouldn't it be %PRIu64 instead? > It is a difference between two addresses, and I believe the value should not be very large. Anyway, I'll follow your advise if you prefer to use %PRIu64. In addition, addr is 'unsigned long addr', sym->start is 'u64', the type if this expression is more or less obscure to readers. By investigating all caller of get_srcline(), I find that the type of 'addr' should be 'u64', not 'unsigned long'. So I'll post another patch which fixes param list of get_srcline() also. Thanks. > Thanks, > Namhyung > > >> >> Signed-off-by: Wang Nan <wangnan0@huawei.com> >> --- >> tools/perf/util/srcline.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c >> index e73b6a5..42cb642 100644 >> --- a/tools/perf/util/srcline.c >> +++ b/tools/perf/util/srcline.c >> @@ -294,7 +294,7 @@ out: >> } >> if (sym) { >> if (asprintf(&srcline, "%s+%ld", show_sym ? sym->name : "", >> - addr - sym->start) < 0) >> + (long int)(addr - sym->start)) < 0) >> return SRCLINE_UNKNOWN; >> } else if (asprintf(&srcline, "%s[%lx]", dso->short_name, addr) < 0) >> return SRCLINE_UNKNOWN; >> -- >> 1.8.4 >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> Please read the FAQ at http://www.tux.org/lkml/ ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2014-12-16 5:47 UTC | newest] Thread overview: 3+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2014-12-16 2:10 [PATCH] perf: fix building warning on ARM 32 Wang Nan 2014-12-16 4:49 ` Namhyung Kim 2014-12-16 5:47 ` Wang Nan
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