[PATCH 2/4] kprobes/treewide: Add kprobes_ prefix to insn alloc/free functions

From: Mark Rutland
Date: Tue Mar 26 2024 - 12:37:03 EST

The alloc_(opt)insn_page() and free_(opt)insn_page() functions are
specific to KPROBES, but their name makes them sound more generic than
they are.

Given them a 'kprobes_' prefix to make it clear that they're part of
kprobes.

This was generated automatically with:

sed -i 's/alloc_insn_page/kprobes_alloc_insn_page/' $(git grep -l 'alloc_insn_page')
sed -i 's/free_insn_page/kprobes_free_insn_page/' $(git grep -l 'free_insn_page')
sed -i 's/alloc_optinsn_page/kprobes_alloc_optinsn_page/' $(git grep -l 'alloc_optinsn_page')
sed -i 's/free_optinsn_page/kprobes_free_optinsn_page/' $(git grep -l 'free_optinsn_page')

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@xxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Naveen N. Rao <naveen.n.rao@xxxxxxxxxxxxx>
---
arch/arm64/kernel/probes/kprobes.c | 2 +-
arch/powerpc/kernel/kprobes.c | 2 +-
arch/powerpc/kernel/optprobes.c | 4 ++--
arch/riscv/kernel/probes/kprobes.c | 2 +-
arch/s390/kernel/kprobes.c | 2 +-
arch/x86/kernel/kprobes/core.c | 2 +-
include/linux/kprobes.h | 6 +++---
kernel/kprobes.c | 20 ++++++++++----------
8 files changed, 20 insertions(+), 20 deletions(-)

diff --git a/arch/arm64/kernel/probes/kprobes.c b/arch/arm64/kernel/probes/kprobes.c
index 327855a11df2f..4b6ab7b1fa211 100644
--- a/arch/arm64/kernel/probes/kprobes.c
+++ b/arch/arm64/kernel/probes/kprobes.c
@@ -129,7 +129,7 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
return 0;
}

-void *alloc_insn_page(void)
+void *kprobes_alloc_insn_page(void)
{
return __vmalloc_node_range(PAGE_SIZE, 1, VMALLOC_START, VMALLOC_END,
GFP_KERNEL, PAGE_KERNEL_ROX, VM_FLUSH_RESET_PERMS,
diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c
index bbca90a5e2ec0..0b297718d5de6 100644
--- a/arch/powerpc/kernel/kprobes.c
+++ b/arch/powerpc/kernel/kprobes.c
@@ -126,7 +126,7 @@ kprobe_opcode_t *arch_adjust_kprobe_addr(unsigned long addr, unsigned long offse
return (kprobe_opcode_t *)(addr + offset);
}

-void *alloc_insn_page(void)
+void *kprobes_alloc_insn_page(void)
{
void *page;

diff --git a/arch/powerpc/kernel/optprobes.c b/arch/powerpc/kernel/optprobes.c
index 004fae2044a3e..0ddbda217073f 100644
--- a/arch/powerpc/kernel/optprobes.c
+++ b/arch/powerpc/kernel/optprobes.c
@@ -27,7 +27,7 @@

static bool insn_page_in_use;

-void *alloc_optinsn_page(void)
+void *kprobes_alloc_optinsn_page(void)
{
if (insn_page_in_use)
return NULL;
@@ -35,7 +35,7 @@ void *alloc_optinsn_page(void)
return &optinsn_slot;
}

-void free_optinsn_page(void *page)
+void kprobes_free_optinsn_page(void *page)
{
insn_page_in_use = false;
}
diff --git a/arch/riscv/kernel/probes/kprobes.c b/arch/riscv/kernel/probes/kprobes.c
index 2f08c14a933d0..75201ce721057 100644
--- a/arch/riscv/kernel/probes/kprobes.c
+++ b/arch/riscv/kernel/probes/kprobes.c
@@ -105,7 +105,7 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
}

#ifdef CONFIG_MMU
-void *alloc_insn_page(void)
+void *kprobes_alloc_insn_page(void)
{
return __vmalloc_node_range(PAGE_SIZE, 1, VMALLOC_START, VMALLOC_END,
GFP_KERNEL, PAGE_KERNEL_READ_EXEC,
diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c
index f0cf20d4b3c58..91ca4d501d4ef 100644
--- a/arch/s390/kernel/kprobes.c
+++ b/arch/s390/kernel/kprobes.c
@@ -34,7 +34,7 @@ struct kretprobe_blackpoint kretprobe_blacklist[] = { };

static int insn_page_in_use;

-void *alloc_insn_page(void)
+void *kprobes_alloc_insn_page(void)
{
void *page;

diff --git a/arch/x86/kernel/kprobes/core.c b/arch/x86/kernel/kprobes/core.c
index d0e49bd7c6f3f..7f01bbbfa9e2a 100644
--- a/arch/x86/kernel/kprobes/core.c
+++ b/arch/x86/kernel/kprobes/core.c
@@ -491,7 +491,7 @@ static int prepare_singlestep(kprobe_opcode_t *buf, struct kprobe *p,
}

/* Make page to RO mode when allocate it */
-void *alloc_insn_page(void)
+void *kprobes_alloc_insn_page(void)
{
void *page;

diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h
index 0ff44d6633e33..ad4b561100f9e 100644
--- a/include/linux/kprobes.h
+++ b/include/linux/kprobes.h
@@ -430,10 +430,10 @@ int enable_kprobe(struct kprobe *kp);

void dump_kprobe(struct kprobe *kp);

-void *alloc_insn_page(void);
+void *kprobes_alloc_insn_page(void);

-void *alloc_optinsn_page(void);
-void free_optinsn_page(void *page);
+void *kprobes_alloc_optinsn_page(void);
+void kprobes_free_optinsn_page(void *page);

int kprobe_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
char *sym);
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 9d9095e817928..35adf56430c9b 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -110,7 +110,7 @@ enum kprobe_slot_state {
SLOT_USED = 2,
};

-void __weak *alloc_insn_page(void)
+void __weak *kprobes_alloc_insn_page(void)
{
/*
* Use module_alloc() so this page is within +/- 2GB of where the
@@ -121,15 +121,15 @@ void __weak *alloc_insn_page(void)
return module_alloc(PAGE_SIZE);
}

-static void free_insn_page(void *page)
+static void kprobes_free_insn_page(void *page)
{
module_memfree(page);
}

struct kprobe_insn_cache kprobe_insn_slots = {
.mutex = __MUTEX_INITIALIZER(kprobe_insn_slots.mutex),
- .alloc = alloc_insn_page,
- .free = free_insn_page,
+ .alloc = kprobes_alloc_insn_page,
+ .free = kprobes_free_insn_page,
.sym = KPROBE_INSN_PAGE_SYM,
.pages = LIST_HEAD_INIT(kprobe_insn_slots.pages),
.insn_size = MAX_INSN_SIZE,
@@ -333,21 +333,21 @@ int kprobe_cache_get_kallsym(struct kprobe_insn_cache *c, unsigned int *symnum,
}

#ifdef CONFIG_OPTPROBES
-void __weak *alloc_optinsn_page(void)
+void __weak *kprobes_alloc_optinsn_page(void)
{
- return alloc_insn_page();
+ return kprobes_alloc_insn_page();
}

-void __weak free_optinsn_page(void *page)
+void __weak kprobes_free_optinsn_page(void *page)
{
- free_insn_page(page);
+ kprobes_free_insn_page(page);
}

/* For optimized_kprobe buffer */
struct kprobe_insn_cache kprobe_optinsn_slots = {
.mutex = __MUTEX_INITIALIZER(kprobe_optinsn_slots.mutex),
- .alloc = alloc_optinsn_page,
- .free = free_optinsn_page,
+ .alloc = kprobes_alloc_optinsn_page,
+ .free = kprobes_free_optinsn_page,
.sym = KPROBE_OPTINSN_PAGE_SYM,
.pages = LIST_HEAD_INIT(kprobe_optinsn_slots.pages),
/* .insn_size is initialized later */
--
2.30.2