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Date: Sat, 3 Sep 2022 12:23:27 -0400
From: guoren@...nel.org
To: oleg@...hat.com, vgupta@...nel.org, linux@...linux.org.uk,
monstr@...str.eu, dinguyen@...nel.org, palmer@...belt.com,
davem@...emloft.net, arnd@...db.de, shorne@...il.com,
guoren@...nel.org
Cc: linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-riscv@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org,
linux-snps-arc@...ts.infradead.org, sparclinux@...r.kernel.org,
openrisc@...ts.librecores.org, Guo Ren <guoren@...ux.alibaba.com>
Subject: [PATCH V2 3/3] arch: ptrace: Cleanup ptrace_disable
From: Guo Ren <guoren@...ux.alibaba.com>
Add a weak empty function in common and remove architectures' duplicated
ones.
Signed-off-by: Guo Ren <guoren@...ux.alibaba.com>
Signed-off-by: Guo Ren <guoren@...nel.org>
Reviewed-by: Oleg Nesterov <oleg@...hat.com>
---
arch/arc/kernel/ptrace.c | 4 ----
arch/arm/kernel/ptrace.c | 8 --------
arch/microblaze/kernel/ptrace.c | 5 -----
arch/nios2/kernel/ptrace.c | 5 -----
arch/riscv/kernel/ptrace.c | 4 ----
arch/sparc/kernel/ptrace_32.c | 10 ----------
arch/sparc/kernel/ptrace_64.c | 10 ----------
kernel/ptrace.c | 8 ++++++++
8 files changed, 8 insertions(+), 46 deletions(-)
diff --git a/arch/arc/kernel/ptrace.c b/arch/arc/kernel/ptrace.c
index da7542cea0d8..c227e145fede 100644
--- a/arch/arc/kernel/ptrace.c
+++ b/arch/arc/kernel/ptrace.c
@@ -317,10 +317,6 @@ const struct user_regset_view *task_user_regset_view(struct task_struct *task)
return &user_arc_view;
}
-void ptrace_disable(struct task_struct *child)
-{
-}
-
long arch_ptrace(struct task_struct *child, long request,
unsigned long addr, unsigned long data)
{
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index bfe88c6e60d5..b85f5bdc56ef 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -186,14 +186,6 @@ put_user_reg(struct task_struct *task, int offset, long data)
return ret;
}
-/*
- * Called by kernel/ptrace.c when detaching..
- */
-void ptrace_disable(struct task_struct *child)
-{
- /* Nothing to do. */
-}
-
/*
* Handle hitting a breakpoint.
*/
diff --git a/arch/microblaze/kernel/ptrace.c b/arch/microblaze/kernel/ptrace.c
index 5234d0c1dcaa..72e3eece72aa 100644
--- a/arch/microblaze/kernel/ptrace.c
+++ b/arch/microblaze/kernel/ptrace.c
@@ -162,8 +162,3 @@ asmlinkage void do_syscall_trace_leave(struct pt_regs *regs)
if (step || test_thread_flag(TIF_SYSCALL_TRACE))
ptrace_report_syscall_exit(regs, step);
}
-
-void ptrace_disable(struct task_struct *child)
-{
- /* nothing to do */
-}
diff --git a/arch/nios2/kernel/ptrace.c b/arch/nios2/kernel/ptrace.c
index cd62f310778b..de5f4199c45f 100644
--- a/arch/nios2/kernel/ptrace.c
+++ b/arch/nios2/kernel/ptrace.c
@@ -117,11 +117,6 @@ const struct user_regset_view *task_user_regset_view(struct task_struct *task)
return &nios2_user_view;
}
-void ptrace_disable(struct task_struct *child)
-{
-
-}
-
long arch_ptrace(struct task_struct *child, long request, unsigned long addr,
unsigned long data)
{
diff --git a/arch/riscv/kernel/ptrace.c b/arch/riscv/kernel/ptrace.c
index 44f4b1ca315d..19e4d8057e24 100644
--- a/arch/riscv/kernel/ptrace.c
+++ b/arch/riscv/kernel/ptrace.c
@@ -210,10 +210,6 @@ unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n)
return 0;
}
-void ptrace_disable(struct task_struct *child)
-{
-}
-
long arch_ptrace(struct task_struct *child, long request,
unsigned long addr, unsigned long data)
{
diff --git a/arch/sparc/kernel/ptrace_32.c b/arch/sparc/kernel/ptrace_32.c
index e7db48acb838..f6df84e12739 100644
--- a/arch/sparc/kernel/ptrace_32.c
+++ b/arch/sparc/kernel/ptrace_32.c
@@ -29,16 +29,6 @@
/* #define ALLOW_INIT_TRACING */
-/*
- * Called by kernel/ptrace.c when detaching..
- *
- * Make sure single step bits etc are not set.
- */
-void ptrace_disable(struct task_struct *child)
-{
- /* nothing to do */
-}
-
enum sparc_regset {
REGSET_GENERAL,
REGSET_FP,
diff --git a/arch/sparc/kernel/ptrace_64.c b/arch/sparc/kernel/ptrace_64.c
index 86a7eb5c27ba..b20a16ebe533 100644
--- a/arch/sparc/kernel/ptrace_64.c
+++ b/arch/sparc/kernel/ptrace_64.c
@@ -83,16 +83,6 @@ static const struct pt_regs_offset regoffset_table[] = {
REG_OFFSET_END,
};
-/*
- * Called by kernel/ptrace.c when detaching..
- *
- * Make sure single step bits etc are not set.
- */
-void ptrace_disable(struct task_struct *child)
-{
- /* nothing to do */
-}
-
/* To get the necessary page struct, access_process_vm() first calls
* get_user_pages(). This has done a flush_dcache_page() on the
* accessed page. Then our caller (copy_{to,from}_user_page()) did
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 1893d909e45c..77299bb65d97 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -579,6 +579,14 @@ static bool __ptrace_detach(struct task_struct *tracer, struct task_struct *p)
return dead;
}
+__weak void ptrace_disable(struct task_struct *child)
+{
+ /*
+ * Nothing to do.., some architectures would replace it with
+ * their own function.
+ */
+}
+
static int ptrace_detach(struct task_struct *child, unsigned int data)
{
if (!valid_signal(data))
--
2.36.1
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