linux-kernel - [PATCH v2 2/3] memory: export symbols for memory related functions

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Message-ID: <20230614032038.11699-3-Wei-chin.Tsai@mediatek.com>
Date:   Wed, 14 Jun 2023 11:20:34 +0800
From:   Wei Chin Tsai <Wei-chin.Tsai@...iatek.com>
To:     <linux-kernel@...r.kernel.org>,
        Russell King <linux@...linux.org.uk>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
CC:     <wsd_upstream@...iatek.com>, <wei-chin.tsai@...iatek.com>,
        <mel.lee@...iatek.com>, <ivan.tseng@...iatek.com>,
        Wei Chin Tsai <Wei-chin.Tsai@...iatek.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-fsdevel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: [PATCH v2 2/3] memory: export symbols for memory related functions

In this patch, we modified 3 files and export symbols
for 2 functions.
Export symbols for "smap_gather_stats" functions so that
user can have an idea for each user process memory's usage.
Export symbols for "arch_vma_name" functions so that
user can know the heap usage for each user process.
According to these two information, user can do the memory
statistics and anaysis.

Signed-off-by: Wei Chin Tsai <Wei-chin.Tsai@...iatek.com>
---
 arch/arm/kernel/process.c | 1 +
 fs/proc/task_mmu.c        | 5 +++--
 kernel/signal.c           | 1 +
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 0e8ff85890ad..df91412a1069 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -343,6 +343,7 @@ const char *arch_vma_name(struct vm_area_struct *vma)
 {
 	return is_gate_vma(vma) ? "[vectors]" : NULL;
 }
+EXPORT_SYMBOL_GPL(arch_vma_name);
 
 /* If possible, provide a placement hint at a random offset from the
  * stack for the sigpage and vdso pages.
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 6259dd432eeb..814d7829a20b 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -773,8 +773,8 @@ static const struct mm_walk_ops smaps_shmem_walk_ops = {
  *
  * Use vm_start of @vma as the beginning address if @start is 0.
  */
-static void smap_gather_stats(struct vm_area_struct *vma,
-		struct mem_size_stats *mss, unsigned long start)
+void smap_gather_stats(struct vm_area_struct *vma,
+		       struct mem_size_stats *mss, unsigned long start)
 {
 	const struct mm_walk_ops *ops = &smaps_walk_ops;
 
@@ -809,6 +809,7 @@ static void smap_gather_stats(struct vm_area_struct *vma,
 	else
 		walk_page_range(vma->vm_mm, start, vma->vm_end, ops, mss);
 }
+EXPORT_SYMBOL_GPL(smap_gather_stats);
 
 #define SEQ_PUT_DEC(str, val) \
 		seq_put_decimal_ull_width(m, str, (val) >> 10, 8)
diff --git a/kernel/signal.c b/kernel/signal.c
index b5370fe5c198..a1abe77fcdc3 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -4700,6 +4700,7 @@ __weak const char *arch_vma_name(struct vm_area_struct *vma)
 {
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(arch_vma_name);
 
 static inline void siginfo_buildtime_checks(void)
 {
-- 
2.18.0