An issue was reported with clang and llvm libc where the noinline attribute [1] was being expanded due to the #define in linux/compiler.h (now in compiler_attributes.h). The expansion caused the __attribute__ to appear twice and break the build. To avoid this conflict, rename noinline to __noinline which is more consistent with other compiler attributes. [1] https://clang.llvm.org/docs/AttributeReference.html#noinline Reported-by: Christopher Di Bella <cjdb@xxxxxxxxxx> Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx> --- tools/include/linux/compiler_attributes.h | 4 ++-- tools/perf/arch/x86/tests/bp-modify.c | 4 ++-- tools/perf/bench/find-bit-bench.c | 2 +- tools/perf/tests/bp_account.c | 2 +- tools/perf/tests/bp_signal.c | 2 +- tools/perf/tests/bp_signal_overflow.c | 2 +- tools/perf/tests/dwarf-unwind.c | 12 ++++++------ tools/perf/tests/workloads/leafloop.c | 8 ++++---- tools/perf/tests/workloads/thloop.c | 4 ++-- 9 files changed, 20 insertions(+), 20 deletions(-) diff --git a/tools/include/linux/compiler_attributes.h b/tools/include/linux/compiler_attributes.h index 9bfaec783e48..1ff3d85f5af3 100644 --- a/tools/include/linux/compiler_attributes.h +++ b/tools/include/linux/compiler_attributes.h @@ -267,12 +267,12 @@ # define __flatten __attribute__((flatten)) /* - * Note the missing underscores. + * Note, the kernel version is missing the underscores. * * gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-noinline-function-attribute * clang: mentioned */ -#define noinline __attribute__((__noinline__)) +#define __noinline __attribute__((__noinline__)) /* * Optional: only supported since gcc >= 8 diff --git a/tools/perf/arch/x86/tests/bp-modify.c b/tools/perf/arch/x86/tests/bp-modify.c index 0924ccd9e36d..65493ff7a76f 100644 --- a/tools/perf/arch/x86/tests/bp-modify.c +++ b/tools/perf/arch/x86/tests/bp-modify.c @@ -15,13 +15,13 @@ #include "tests/tests.h" #include "arch-tests.h" -static noinline int bp_1(void) +static __noinline int bp_1(void) { pr_debug("in %s\n", __func__); return 0; } -static noinline int bp_2(void) +static __noinline int bp_2(void) { pr_debug("in %s\n", __func__); return 0; diff --git a/tools/perf/bench/find-bit-bench.c b/tools/perf/bench/find-bit-bench.c index 7e25b0e413f6..dd97a51649bc 100644 --- a/tools/perf/bench/find-bit-bench.c +++ b/tools/perf/bench/find-bit-bench.c @@ -31,7 +31,7 @@ static const char *const bench_usage[] = { static unsigned int accumulator; static unsigned int use_of_val; -static noinline void workload(int val) +static __noinline void workload(int val) { use_of_val += val; accumulator++; diff --git a/tools/perf/tests/bp_account.c b/tools/perf/tests/bp_account.c index 6f921db33cf9..459f61752a71 100644 --- a/tools/perf/tests/bp_account.c +++ b/tools/perf/tests/bp_account.c @@ -34,7 +34,7 @@ static volatile long the_var; -static noinline int test_function(void) +static __noinline int test_function(void) { return 0; } diff --git a/tools/perf/tests/bp_signal.c b/tools/perf/tests/bp_signal.c index 1f2908f02389..484a7e7f96ee 100644 --- a/tools/perf/tests/bp_signal.c +++ b/tools/perf/tests/bp_signal.c @@ -59,7 +59,7 @@ static void __test_function(volatile long *ptr) } #endif -static noinline int test_function(void) +static __noinline int test_function(void) { __test_function(&the_var); the_var++; diff --git a/tools/perf/tests/bp_signal_overflow.c b/tools/perf/tests/bp_signal_overflow.c index 4e897c2cf26b..9436bf2973f8 100644 --- a/tools/perf/tests/bp_signal_overflow.c +++ b/tools/perf/tests/bp_signal_overflow.c @@ -30,7 +30,7 @@ static int overflows; -static noinline int test_function(void) +static __noinline int test_function(void) { return time(NULL); } diff --git a/tools/perf/tests/dwarf-unwind.c b/tools/perf/tests/dwarf-unwind.c index d01aa931fe81..a669c69a9242 100644 --- a/tools/perf/tests/dwarf-unwind.c +++ b/tools/perf/tests/dwarf-unwind.c @@ -109,7 +109,7 @@ static int unwind_entry(struct unwind_entry *entry, void *arg) return strcmp((const char *) symbol, funcs[idx]); } -NO_TAIL_CALL_ATTRIBUTE noinline int test_dwarf_unwind__thread(struct thread *thread) +NO_TAIL_CALL_ATTRIBUTE __noinline int test_dwarf_unwind__thread(struct thread *thread) { struct perf_sample sample; unsigned long cnt = 0; @@ -140,7 +140,7 @@ NO_TAIL_CALL_ATTRIBUTE noinline int test_dwarf_unwind__thread(struct thread *thr static int global_unwind_retval = -INT_MAX; -NO_TAIL_CALL_ATTRIBUTE noinline int test_dwarf_unwind__compare(void *p1, void *p2) +NO_TAIL_CALL_ATTRIBUTE __noinline int test_dwarf_unwind__compare(void *p1, void *p2) { /* Any possible value should be 'thread' */ struct thread *thread = *(struct thread **)p1; @@ -159,7 +159,7 @@ NO_TAIL_CALL_ATTRIBUTE noinline int test_dwarf_unwind__compare(void *p1, void *p return p1 - p2; } -NO_TAIL_CALL_ATTRIBUTE noinline int test_dwarf_unwind__krava_3(struct thread *thread) +NO_TAIL_CALL_ATTRIBUTE __noinline int test_dwarf_unwind__krava_3(struct thread *thread) { struct thread *array[2] = {thread, thread}; void *fp = &bsearch; @@ -178,7 +178,7 @@ NO_TAIL_CALL_ATTRIBUTE noinline int test_dwarf_unwind__krava_3(struct thread *th return global_unwind_retval; } -NO_TAIL_CALL_ATTRIBUTE noinline int test_dwarf_unwind__krava_2(struct thread *thread) +NO_TAIL_CALL_ATTRIBUTE __noinline int test_dwarf_unwind__krava_2(struct thread *thread) { int ret; @@ -187,7 +187,7 @@ NO_TAIL_CALL_ATTRIBUTE noinline int test_dwarf_unwind__krava_2(struct thread *th return ret; } -NO_TAIL_CALL_ATTRIBUTE noinline int test_dwarf_unwind__krava_1(struct thread *thread) +NO_TAIL_CALL_ATTRIBUTE __noinline int test_dwarf_unwind__krava_1(struct thread *thread) { int ret; @@ -196,7 +196,7 @@ NO_TAIL_CALL_ATTRIBUTE noinline int test_dwarf_unwind__krava_1(struct thread *th return ret; } -noinline int test__dwarf_unwind(struct test_suite *test __maybe_unused, +__noinline int test__dwarf_unwind(struct test_suite *test __maybe_unused, int subtest __maybe_unused) { struct machine *machine; diff --git a/tools/perf/tests/workloads/leafloop.c b/tools/perf/tests/workloads/leafloop.c index 1bf5cc97649b..89d2cec2f461 100644 --- a/tools/perf/tests/workloads/leafloop.c +++ b/tools/perf/tests/workloads/leafloop.c @@ -4,18 +4,18 @@ #include "../tests.h" /* We want to check these symbols in perf script */ -noinline void leaf(volatile int b); -noinline void parent(volatile int b); +__noinline void leaf(volatile int b); +__noinline void parent(volatile int b); static volatile int a; -noinline void leaf(volatile int b) +__noinline void leaf(volatile int b) { for (;;) a += b; } -noinline void parent(volatile int b) +__noinline void parent(volatile int b) { leaf(b); } diff --git a/tools/perf/tests/workloads/thloop.c b/tools/perf/tests/workloads/thloop.c index 457b29f91c3e..e252efb76203 100644 --- a/tools/perf/tests/workloads/thloop.c +++ b/tools/perf/tests/workloads/thloop.c @@ -9,14 +9,14 @@ static volatile sig_atomic_t done; /* We want to check this symbol in perf report */ -noinline void test_loop(void); +__noinline void test_loop(void); static void sighandler(int sig __maybe_unused) { done = 1; } -noinline void test_loop(void) +__noinline void test_loop(void) { while (!done); } -- 2.44.0.278.ge034bb2e1d-goog
