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* [PATCH for v5.15] perf symbol: Remove arch__symbols__fixup_end()
@ 2022-05-03  0:37 Namhyung Kim
  2022-05-03 13:45 ` Greg KH
  0 siblings, 1 reply; 2+ messages in thread
From: Namhyung Kim @ 2022-05-03  0:37 UTC (permalink / raw)
  To: stable
  Cc: Mark Rutland, Ian Rogers, Song Liu, Mathieu Poirier, linux-s390,
	Michael Petlan, Heiko Carstens, John Garry, linuxppc-dev,
	Arnaldo Carvalho de Melo, Peter Zijlstra, Masami Hiramatsu,
	Jiri Olsa, Leo Yan, Will Deacon, Ingo Molnar

Now the generic code can handle kallsyms fixup properly so no need to
keep the arch-functions anymore.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.garry@huawei.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Will Deacon <will@kernel.org>
Cc: linux-s390@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Link: https://lore.kernel.org/r/20220416004048.1514900-4-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
The original commit id is a5d20d42a2f2dc2b2f9e9361912062732414090d

 tools/perf/arch/arm64/util/Build       |  1 -
 tools/perf/arch/arm64/util/machine.c   | 28 --------------------------
 tools/perf/arch/powerpc/util/Build     |  1 -
 tools/perf/arch/powerpc/util/machine.c | 25 -----------------------
 tools/perf/arch/s390/util/machine.c    | 16 ---------------
 tools/perf/util/symbol.c               |  5 -----
 tools/perf/util/symbol.h               |  1 -
 7 files changed, 77 deletions(-)
 delete mode 100644 tools/perf/arch/arm64/util/machine.c
 delete mode 100644 tools/perf/arch/powerpc/util/machine.c

diff --git a/tools/perf/arch/arm64/util/Build b/tools/perf/arch/arm64/util/Build
index 9fcb4e68add9..78dfc282e5e2 100644
--- a/tools/perf/arch/arm64/util/Build
+++ b/tools/perf/arch/arm64/util/Build
@@ -1,5 +1,4 @@
 perf-y += header.o
-perf-y += machine.o
 perf-y += perf_regs.o
 perf-y += tsc.o
 perf-y += pmu.o
diff --git a/tools/perf/arch/arm64/util/machine.c b/tools/perf/arch/arm64/util/machine.c
deleted file mode 100644
index 7e7714290a87..000000000000
--- a/tools/perf/arch/arm64/util/machine.c
+++ /dev/null
@@ -1,28 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-#include <inttypes.h>
-#include <stdio.h>
-#include <string.h>
-#include "debug.h"
-#include "symbol.h"
-
-/* On arm64, kernel text segment starts at high memory address,
- * for example 0xffff 0000 8xxx xxxx. Modules start at a low memory
- * address, like 0xffff 0000 00ax xxxx. When only small amount of
- * memory is used by modules, gap between end of module's text segment
- * and start of kernel text segment may reach 2G.
- * Therefore do not fill this gap and do not assign it to the kernel dso map.
- */
-
-#define SYMBOL_LIMIT (1 << 12) /* 4K */
-
-void arch__symbols__fixup_end(struct symbol *p, struct symbol *c)
-{
-	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;
-	pr_debug4("%s sym:%s end:%#" PRIx64 "\n", __func__, p->name, p->end);
-}
diff --git a/tools/perf/arch/powerpc/util/Build b/tools/perf/arch/powerpc/util/Build
index 8a79c4126e5b..0115f3166568 100644
--- a/tools/perf/arch/powerpc/util/Build
+++ b/tools/perf/arch/powerpc/util/Build
@@ -1,5 +1,4 @@
 perf-y += header.o
-perf-y += machine.o
 perf-y += kvm-stat.o
 perf-y += perf_regs.o
 perf-y += mem-events.o
diff --git a/tools/perf/arch/powerpc/util/machine.c b/tools/perf/arch/powerpc/util/machine.c
deleted file mode 100644
index e652a1aa8132..000000000000
--- a/tools/perf/arch/powerpc/util/machine.c
+++ /dev/null
@@ -1,25 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-#include <inttypes.h>
-#include <stdio.h>
-#include <string.h>
-#include <internal/lib.h> // page_size
-#include "debug.h"
-#include "symbol.h"
-
-/* On powerpc kernel text segment start at memory addresses, 0xc000000000000000
- * whereas the modules are located at very high memory addresses,
- * for example 0xc00800000xxxxxxx. The gap between end of kernel text segment
- * and beginning of first module's text segment is very high.
- * 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)
-{
-	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);
-}
diff --git a/tools/perf/arch/s390/util/machine.c b/tools/perf/arch/s390/util/machine.c
index 7644a4f6d4a4..98bc3f39d5f3 100644
--- a/tools/perf/arch/s390/util/machine.c
+++ b/tools/perf/arch/s390/util/machine.c
@@ -35,19 +35,3 @@ int arch__fix_module_text_start(u64 *start, u64 *size, const char *name)
 
 	return 0;
 }
-
-/* On s390 kernel text segment start is located at very low memory addresses,
- * for example 0x10000. Modules are located at very high memory addresses,
- * for example 0x3ff xxxx xxxx. The gap between end of kernel text segment
- * 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)
-{
-	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;
-	pr_debug4("%s sym:%s end:%#" PRIx64 "\n", __func__, p->name, p->end);
-}
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index a420caebd526..b1e5fd99e38a 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -101,11 +101,6 @@ static int prefix_underscores_count(const char *str)
 	return tail - str;
 }
 
-void __weak arch__symbols__fixup_end(struct symbol *p, struct symbol *c)
-{
-	p->end = c->start;
-}
-
 const char * __weak arch__normalize_symbol_name(const char *name)
 {
 	return name;
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 66d5b732bb7a..28721d761d91 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -230,7 +230,6 @@ const char *arch__normalize_symbol_name(const char *name);
 #define SYMBOL_A 0
 #define SYMBOL_B 1
 
-void arch__symbols__fixup_end(struct symbol *p, struct symbol *c);
 int arch__compare_symbol_names(const char *namea, const char *nameb);
 int arch__compare_symbol_names_n(const char *namea, const char *nameb,
 				 unsigned int n);
-- 
2.36.0.464.gb9c8b46e94-goog


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2022-05-03  0:37 [PATCH for v5.15] perf symbol: Remove arch__symbols__fixup_end() Namhyung Kim
2022-05-03 13:45 ` Greg KH

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