Subject: Patch "perf symbol: Remove arch__symbols__fixup_end()" has been added to the 5.17-stable tree

From: <[email-masked]>
Date: Tue, 03 May 2022 01:05:41 +0200

This is a note to let you know that I've just added the patch titled

    perf symbol: Remove arch__symbols__fixup_end()

to the 5.17-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     perf-symbol-remove-arch__symbols__fixup_end.patch
and it can be found in the queue-5.17 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <[email-masked]> know about it.

>From a5d20d42a2f2dc2b2f9e9361912062732414090d Mon Sep 17 00:00:00 2001
From: Namhyung Kim <[email-masked]>
Date: Fri, 15 Apr 2022 17:40:48 -0700
Subject: perf symbol: Remove arch__symbols__fixup_end()

From: Namhyung Kim <[email-masked]>

commit a5d20d42a2f2dc2b2f9e9361912062732414090d upstream.

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

Fixes: 3cf6a32f3f2a4594 ("perf symbols: Fix symbol size calculation condition")
Signed-off-by: Namhyung Kim <[email-masked]>
Acked-by: Ian Rogers <[email-masked]>
Cc: Heiko Carstens <[email-masked]>
Cc: Ingo Molnar <[email-masked]>
Cc: Jiri Olsa <[email-masked]>
Cc: John Garry <[email-masked]>
Cc: Leo Yan <[email-masked]>
Cc: Mark Rutland <[email-masked]>
Cc: Masami Hiramatsu <[email-masked]>
Cc: Mathieu Poirier <[email-masked]>
Cc: Michael Ellerman <[email-masked]>
Cc: Michael Petlan <[email-masked]>
Cc: Peter Zijlstra <[email-masked]>
Cc: Song Liu <[email-masked]>
Cc: Will Deacon <[email-masked]>
Cc: [email-masked]
Cc: [email-masked]
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Arnaldo Carvalho de Melo <[email-masked]>
Signed-off-by: Greg Kroah-Hartman <[email-masked]>
---
 tools/perf/arch/arm64/util/machine.c   |   21 ---------------------
 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 -
 6 files changed, 69 deletions(-)
 delete mode 100644 tools/perf/arch/powerpc/util/machine.c

--- a/tools/perf/arch/arm64/util/machine.c
+++ b/tools/perf/arch/arm64/util/machine.c
@@ -8,27 +8,6 @@
 #include "callchain.h"
 #include "record.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);
-}
-
 void arch__add_leaf_frame_record_opts(struct record_opts *opts)
 {
 	opts->sample_user_regs |= sample_reg_masks[PERF_REG_ARM64_LR].mask;
--- 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
--- 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);
-}
--- 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 *sta
 
 	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);
-}
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -101,11 +101,6 @@ static int prefix_underscores_count(cons
 	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;
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -241,7 +241,6 @@ const char *arch__normalize_symbol_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);

Patches currently in stable-queue which might be from [email-masked] are

queue-5.17/perf-symbol-remove-arch__symbols__fixup_end.patch
queue-5.17/perf-arm-spe-fix-addresses-of-synthesized-spe-events.patch
queue-5.17/perf-symbol-update-symbols__fixup_end.patch
queue-5.17/perf-symbol-pass-is_kallsyms-to-symbols__fixup_end.patch