[PATCH v2 4/4] perf symbols: More specific architecture end fixing

[Ian Rogers]

Make the conditions used for symbol fixup closer to the comments. The
logic aims to combine the current conditions as last modified in:
https://lore.kernel.org/lkml/20220317135536.805-1-mpetlan@xxxxxxxxxx/
---
 tools/perf/arch/arm64/util/machine.c   | 19 ++++++++++---------
 tools/perf/arch/powerpc/util/machine.c | 18 +++++++++---------
 tools/perf/arch/s390/util/machine.c    | 17 +++++++++--------
 3 files changed, 28 insertions(+), 26 deletions(-)

diff --git a/tools/perf/arch/arm64/util/machine.c b/tools/perf/arch/arm64/util/machine.c
index 54fb41de9931..f258c1ebac03 100644
--- a/tools/perf/arch/arm64/util/machine.c
+++ b/tools/perf/arch/arm64/util/machine.c
@@ -18,16 +18,17 @@
 
 #define SYMBOL_LIMIT (1 << 12) /* 4K */
 
-void arch__symbols__fixup_end(struct symbol *p, struct symbol *c,
-			      bool is_kernel __maybe_unused)
+void arch__symbols__fixup_end(struct symbol *p, struct symbol *c, bool is_kernel)
 {
-	if (p->end == p->start || p->end != c->start) {
-		if ((strchr(p->name, '[') && strchr(c->name, '[') == NULL) ||
-			(strchr(p->name, '[') == NULL && strchr(c->name, '[')))
-			/* Limit range of last symbol in module and kernel */
-			p->end += SYMBOL_LIMIT;
-		else
-			p->end = c->start;
+	if (is_kernel && (p->end == p->start || p->end != c->start) &&
+	    ((strchr(p->name, '[') && strchr(c->name, '[') == NULL) ||
+	     (strchr(p->name, '[') == NULL && strchr(c->name, '[')))) {
+		/* Limit range of last symbol in module and kernel */
+		p->end += SYMBOL_LIMIT;
+		pr_debug4("%s sym:%s end:%#" PRIx64 "\n", __func__, p->name, p->end);
+	} else if (p->end == p->start) {
+		/* Expand empty symbols. */
+		p->end = c->start;
 		pr_debug4("%s sym:%s end:%#" PRIx64 "\n", __func__, p->name, p->end);
 	}
 }
diff --git a/tools/perf/arch/powerpc/util/machine.c b/tools/perf/arch/powerpc/util/machine.c
index a732601f951e..689a48040b64 100644
--- a/tools/perf/arch/powerpc/util/machine.c
+++ b/tools/perf/arch/powerpc/util/machine.c
@@ -14,16 +14,16 @@
  * Therefore do not fill this gap and do not assign it to the kernel dso map.
  */
 
-void arch__symbols__fixup_end(struct symbol *p, struct symbol *c,
-			      bool is_kernel __maybe_unused)
+void arch__symbols__fixup_end(struct symbol *p, struct symbol *c, bool is_kernel)
 )
 {
-	if (p->end == p->start || p->end != c->start) {
-		if (strchr(p->name, '[') == NULL && strchr(c->name, '['))
-			/* Limit the range of last kernel symbol */
-			p->end += page_size;
-		else
-			p->end = c->start;
-		pr_debug4("%s sym:%s end:%#" PRIx64 "\n", __func__, p->name, p->end);
+	if (is_kernel && (p->end == p->start || p->end != c->start) &&
+	    strchr(p->name, '[') == NULL && strchr(c->name, '[')) {
+		/* Limit the range of last kernel symbol */
+		p->end += page_size;
+	} else if (p->end == p->start) {
+		/* Expand empty symbols. */
+		p->end = c->start;
 	}
+	pr_debug4("%s sym:%s end:%#" PRIx64 "\n", __func__, p->name, p->end);
 }
diff --git a/tools/perf/arch/s390/util/machine.c b/tools/perf/arch/s390/util/machine.c
index 8622a1b78748..790d98a39c83 100644
--- a/tools/perf/arch/s390/util/machine.c
+++ b/tools/perf/arch/s390/util/machine.c
@@ -42,15 +42,16 @@ int arch__fix_module_text_start(u64 *start, u64 *size, const char *name)
  * and beginning of first module's text segment is very big.
  * Therefore do not fill this gap and do not assign it to the kernel dso map.
  */
-void arch__symbols__fixup_end(struct symbol *p, struct symbol *c,
-			      bool is_kernel __maybe_unused)
+void arch__symbols__fixup_end(struct symbol *p, struct symbol *c, bool is_kernel)
 {
-	if (p->end == p->start || p->end != c->start) {
-		if (strchr(p->name, '[') == NULL && strchr(c->name, '['))
-			/* Last kernel symbol mapped to end of page */
-			p->end = roundup(p->end, page_size);
-		else
-			p->end = c->start;
+	if (is_kernel && (p->end == p->start || p->end != c->start) &&
+	    strchr(p->name, '[') == NULL && strchr(c->name, '[')) {
+		/* Last kernel symbol mapped to end of page */
+		p->end = roundup(p->end, page_size);
+		pr_debug4("%s sym:%s end:%#" PRIx64 "\n", __func__, p->name, p->end);
+	} else if (p->end == p->start) {
+		/* Expand empty symbols. */
+		p->end = c->start;
 		pr_debug4("%s sym:%s end:%#" PRIx64 "\n", __func__, p->name, p->end);
 	}
 }
-- 
2.35.1.1178.g4f1659d476-goog