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* [PATCH] tools: Rename __fallthrough to fallthrough
@ 2022-11-25 15:50 Liam Howlett
  2022-11-25 18:50 ` Miguel Ojeda
  0 siblings, 1 reply; 8+ messages in thread
From: Liam Howlett @ 2022-11-25 15:50 UTC (permalink / raw)
  To: linux-perf-users, linux-kernel, llvm, linux-sparse
  Cc: Liam Howlett, Peter Zijlstra, Ingo Molnar, Mark Rutland,
	Miguel Ojeda, Rasmus Villemoes, Arnaldo Carvalho de Melo,
	Nathan Chancellor, Nick Desaulniers, Tom Rix

Rename the fallthrough attribute to better align with the kernel
version.  Copy the definition from include/linux/compiler_attributes.h
including the #else clause.  Adding the #else clause allows the tools
compiler.h header to drop the check for a definition entirely and keeps
both definitions together.

Change any __fallthrough statements to fallthrough anywhere it was used
within perf.

This allows other tools to use the same key word as the kernel.

Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Tom Rix <trix@redhat.com>
Signed-off-by: Liam Howlett <Liam.Howlett@oracle.com>
---
 tools/include/linux/compiler-gcc.h                      | 6 ++++--
 tools/include/linux/compiler.h                          | 4 ----
 tools/perf/builtin-probe.c                              | 2 +-
 tools/perf/builtin-stat.c                               | 2 +-
 tools/perf/builtin-top.c                                | 2 +-
 tools/perf/util/callchain.c                             | 4 ++--
 tools/perf/util/intel-pt-decoder/intel-pt-decoder.c     | 6 +++---
 tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c | 2 +-
 tools/perf/util/ordered-events.c                        | 2 +-
 tools/perf/util/strfilter.c                             | 2 +-
 tools/perf/util/string.c                                | 2 +-
 11 files changed, 16 insertions(+), 18 deletions(-)

diff --git a/tools/include/linux/compiler-gcc.h b/tools/include/linux/compiler-gcc.h
index 8816f06fc6c7..62e7c901ac28 100644
--- a/tools/include/linux/compiler-gcc.h
+++ b/tools/include/linux/compiler-gcc.h
@@ -12,8 +12,10 @@
 		     + __GNUC_PATCHLEVEL__)
 #endif
 
-#if GCC_VERSION >= 70000 && !defined(__CHECKER__)
-# define __fallthrough __attribute__ ((fallthrough))
+#if __has_attribute(__fallthrough__)
+# define fallthrough                    __attribute__((__fallthrough__))
+#else
+# define fallthrough                    do {} while (0)  /* fallthrough */
 #endif
 
 #if __has_attribute(__error__)
diff --git a/tools/include/linux/compiler.h b/tools/include/linux/compiler.h
index 90ba44a99199..9d36c8ce1fe7 100644
--- a/tools/include/linux/compiler.h
+++ b/tools/include/linux/compiler.h
@@ -186,10 +186,6 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s
 })
 
 
-#ifndef __fallthrough
-# define __fallthrough
-#endif
-
 /* Indirect macros required for expanded argument pasting, eg. __LINE__. */
 #define ___PASTE(a, b) a##b
 #define __PASTE(a, b) ___PASTE(a, b)
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index f62298f5db3b..8539843d1909 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -706,7 +706,7 @@ __cmd_probe(int argc, const char **argv)
 			pr_err("  Error: --bootconfig doesn't support uprobes.\n");
 			return -EINVAL;
 		}
-		__fallthrough;
+		fallthrough;
 	case 'a':
 
 		/* Ensure the last given target is used */
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 265b05157972..19b0278d496c 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -616,7 +616,7 @@ static void process_evlist(struct evlist *evlist, unsigned int interval)
 	if (evlist__ctlfd_process(evlist, &cmd) > 0) {
 		switch (cmd) {
 		case EVLIST_CTL_CMD_ENABLE:
-			__fallthrough;
+			fallthrough;
 		case EVLIST_CTL_CMD_DISABLE:
 			if (interval)
 				process_interval();
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 4b3ff7687236..cfe1cde35528 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -707,7 +707,7 @@ static void *display_thread(void *arg)
 		case -1:
 			if (errno == EINTR)
 				continue;
-			__fallthrough;
+			fallthrough;
 		default:
 			c = getc(stdin);
 			tcsetattr(0, TCSAFLUSH, &save);
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index a093a15f048f..588f86a84eaa 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -724,7 +724,7 @@ static enum match_result match_chain(struct callchain_cursor_node *node,
 		if (match != MATCH_ERROR)
 			break;
 		/* otherwise fall-back to symbol-based comparison below */
-		__fallthrough;
+		fallthrough;
 	case CCKEY_FUNCTION:
 		if (node->ms.sym && cnode->ms.sym) {
 			/*
@@ -745,7 +745,7 @@ static enum match_result match_chain(struct callchain_cursor_node *node,
 			}
 		}
 		/* otherwise fall-back to IP-based comparison below */
-		__fallthrough;
+		fallthrough;
 	case CCKEY_ADDRESS:
 	default:
 		match = match_chain_dso_addresses(cnode->ms.map, cnode->ip, node->ms.map, node->ip);
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
index 0ac860c8dd2b..57dea8074777 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
@@ -3544,7 +3544,7 @@ static int intel_pt_walk_psb(struct intel_pt_decoder *decoder)
 		switch (decoder->packet.type) {
 		case INTEL_PT_TIP_PGD:
 			decoder->continuous_period = false;
-			__fallthrough;
+			fallthrough;
 		case INTEL_PT_TIP_PGE:
 		case INTEL_PT_TIP:
 		case INTEL_PT_PTWRITE:
@@ -3614,7 +3614,7 @@ static int intel_pt_walk_psb(struct intel_pt_decoder *decoder)
 			decoder->pge = false;
 			decoder->continuous_period = false;
 			intel_pt_clear_tx_flags(decoder);
-			__fallthrough;
+			fallthrough;
 
 		case INTEL_PT_TNT:
 			decoder->have_tma = false;
@@ -3978,7 +3978,7 @@ const struct intel_pt_state *intel_pt_decode(struct intel_pt_decoder *decoder)
 			decoder->have_last_ip = false;
 			decoder->last_ip = 0;
 			decoder->ip = 0;
-			__fallthrough;
+			fallthrough;
 		case INTEL_PT_STATE_ERR_RESYNC:
 			err = intel_pt_sync_ip(decoder);
 			break;
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
index 18f97f43e01a..af9710622a1f 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
@@ -730,7 +730,7 @@ int intel_pt_pkt_desc(const struct intel_pt_pkt *packet, char *buf,
 	case INTEL_PT_FUP:
 		if (!(packet->count))
 			return snprintf(buf, buf_len, "%s no ip", name);
-		__fallthrough;
+		fallthrough;
 	case INTEL_PT_CYC:
 	case INTEL_PT_VMCS:
 	case INTEL_PT_MTC:
diff --git a/tools/perf/util/ordered-events.c b/tools/perf/util/ordered-events.c
index b887dfeea673..8c62611f10aa 100644
--- a/tools/perf/util/ordered-events.c
+++ b/tools/perf/util/ordered-events.c
@@ -284,7 +284,7 @@ static int __ordered_events__flush(struct ordered_events *oe, enum oe_flush how,
 	switch (how) {
 	case OE_FLUSH__FINAL:
 		show_progress = true;
-		__fallthrough;
+		fallthrough;
 	case OE_FLUSH__TOP:
 		oe->next_flush = ULLONG_MAX;
 		break;
diff --git a/tools/perf/util/strfilter.c b/tools/perf/util/strfilter.c
index 78aa4c3b990d..02807b9d4122 100644
--- a/tools/perf/util/strfilter.c
+++ b/tools/perf/util/strfilter.c
@@ -274,7 +274,7 @@ static int strfilter_node__sprint(struct strfilter_node *node, char *buf)
 		len = strfilter_node__sprint_pt(node->l, buf);
 		if (len < 0)
 			return len;
-		__fallthrough;
+		fallthrough;
 	case '!':
 		if (buf) {
 			*(buf + len++) = *node->p;
diff --git a/tools/perf/util/string.c b/tools/perf/util/string.c
index 4f12a96f33cc..cf05b0b56c57 100644
--- a/tools/perf/util/string.c
+++ b/tools/perf/util/string.c
@@ -35,7 +35,7 @@ s64 perf_atoll(const char *str)
 			if (*p)
 				goto out_err;
 
-			__fallthrough;
+			fallthrough;
 		case '\0':
 			return length;
 		default:
-- 
2.35.1

^ permalink raw reply related	[flat|nested] 8+ messages in thread
end of thread, other threads:[~2023-04-06 21:35 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-11-25 15:50 [PATCH] tools: Rename __fallthrough to fallthrough Liam Howlett
2022-11-25 18:50 ` Miguel Ojeda
2023-04-06 19:58   ` Liam R. Howlett
2023-04-06 20:02     ` Miguel Ojeda
2023-04-06 21:11       ` Arnaldo Carvalho de Melo
2023-04-06 21:31         ` Arnaldo Carvalho de Melo
2023-04-06 21:32           ` Arnaldo Carvalho de Melo
2023-04-06 21:35             ` Arnaldo Carvalho de Melo

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