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Date: Thu, 24 Oct 2019 15:58:38 -0700
From: Paul Walmsley <paul.walmsley@...ive.com>
To: linux-riscv@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org, hch@....dev, greentime.hu@...ive.com,
luc.vanoostenryck@...il.com, Christoph Hellwig <hch@....de>
Subject: [PATCH v4 6/6] riscv: for C functions called only from assembly, mark with __visible
Rather than adding prototypes for C functions called only by assembly
code, mark them as __visible. This avoids adding prototypes that will
never be used by the callers. Resolves the following sparse warnings:
arch/riscv/kernel/irq.c:27:29: warning: symbol 'do_IRQ' was not declared. Should it be static?
arch/riscv/kernel/ptrace.c:151:6: warning: symbol 'do_syscall_trace_enter' was not declared. Should it be static?
arch/riscv/kernel/ptrace.c:165:6: warning: symbol 'do_syscall_trace_exit' was not declared. Should it be static?
arch/riscv/kernel/signal.c:295:17: warning: symbol 'do_notify_resume' was not declared. Should it be static?
arch/riscv/kernel/traps.c:92:1: warning: symbol 'do_trap_unknown' was not declared. Should it be static?
arch/riscv/kernel/traps.c:94:1: warning: symbol 'do_trap_insn_misaligned' was not declared. Should it be static?
arch/riscv/kernel/traps.c:96:1: warning: symbol 'do_trap_insn_fault' was not declared. Should it be static?
arch/riscv/kernel/traps.c:98:1: warning: symbol 'do_trap_insn_illegal' was not declared. Should it be static?
arch/riscv/kernel/traps.c:100:1: warning: symbol 'do_trap_load_misaligned' was not declared. Should it be static?
arch/riscv/kernel/traps.c:102:1: warning: symbol 'do_trap_load_fault' was not declared. Should it be static?
arch/riscv/kernel/traps.c:104:1: warning: symbol 'do_trap_store_misaligned' was not declared. Should it be static?
arch/riscv/kernel/traps.c:106:1: warning: symbol 'do_trap_store_fault' was not declared. Should it be static?
arch/riscv/kernel/traps.c:108:1: warning: symbol 'do_trap_ecall_u' was not declared. Should it be static?
arch/riscv/kernel/traps.c:110:1: warning: symbol 'do_trap_ecall_s' was not declared. Should it be static?
arch/riscv/kernel/traps.c:112:1: warning: symbol 'do_trap_ecall_m' was not declared. Should it be static?
arch/riscv/kernel/traps.c:124:17: warning: symbol 'do_trap_break' was not declared. Should it be static?
arch/riscv/kernel/smpboot.c:136:24: warning: symbol 'smp_callin' was not declared. Should it be static?
Based on a suggestion from Luc Van Oostenryck.
This version includes changes based on feedback from Christoph Hellwig
<hch@....de>.
Signed-off-by: Paul Walmsley <paul.walmsley@...ive.com>
Cc: Luc Van Oostenryck <luc.vanoostenryck@...il.com>
Reviewed-by: Christoph Hellwig <hch@....de> # for do_syscall_trace_*
---
arch/riscv/kernel/irq.c | 2 +-
arch/riscv/kernel/ptrace.c | 4 ++--
arch/riscv/kernel/signal.c | 4 ++--
arch/riscv/kernel/smpboot.c | 2 +-
arch/riscv/kernel/traps.c | 4 ++--
5 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/arch/riscv/kernel/irq.c b/arch/riscv/kernel/irq.c
index 6d8659388c49..fffac6ddb0e0 100644
--- a/arch/riscv/kernel/irq.c
+++ b/arch/riscv/kernel/irq.c
@@ -24,7 +24,7 @@ int arch_show_interrupts(struct seq_file *p, int prec)
return 0;
}
-asmlinkage void __irq_entry do_IRQ(struct pt_regs *regs)
+asmlinkage __visible void __irq_entry do_IRQ(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
diff --git a/arch/riscv/kernel/ptrace.c b/arch/riscv/kernel/ptrace.c
index 368751438366..1252113ef8b2 100644
--- a/arch/riscv/kernel/ptrace.c
+++ b/arch/riscv/kernel/ptrace.c
@@ -148,7 +148,7 @@ long arch_ptrace(struct task_struct *child, long request,
* Allows PTRACE_SYSCALL to work. These are called from entry.S in
* {handle,ret_from}_syscall.
*/
-void do_syscall_trace_enter(struct pt_regs *regs)
+__visible void do_syscall_trace_enter(struct pt_regs *regs)
{
if (test_thread_flag(TIF_SYSCALL_TRACE))
if (tracehook_report_syscall_entry(regs))
@@ -162,7 +162,7 @@ void do_syscall_trace_enter(struct pt_regs *regs)
audit_syscall_entry(regs->a7, regs->a0, regs->a1, regs->a2, regs->a3);
}
-void do_syscall_trace_exit(struct pt_regs *regs)
+__visible void do_syscall_trace_exit(struct pt_regs *regs)
{
audit_syscall_exit(regs);
diff --git a/arch/riscv/kernel/signal.c b/arch/riscv/kernel/signal.c
index 64bc914ce9ff..d0f6f212f5df 100644
--- a/arch/riscv/kernel/signal.c
+++ b/arch/riscv/kernel/signal.c
@@ -292,8 +292,8 @@ static void do_signal(struct pt_regs *regs)
* notification of userspace execution resumption
* - triggered by the _TIF_WORK_MASK flags
*/
-asmlinkage void do_notify_resume(struct pt_regs *regs,
- unsigned long thread_info_flags)
+asmlinkage __visible void do_notify_resume(struct pt_regs *regs,
+ unsigned long thread_info_flags)
{
/* Handle pending signal delivery */
if (thread_info_flags & _TIF_SIGPENDING)
diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c
index ec0be2f6a2e8..261f4087cc39 100644
--- a/arch/riscv/kernel/smpboot.c
+++ b/arch/riscv/kernel/smpboot.c
@@ -133,7 +133,7 @@ void __init smp_cpus_done(unsigned int max_cpus)
/*
* C entry point for a secondary processor.
*/
-asmlinkage void __init smp_callin(void)
+asmlinkage __visible void __init smp_callin(void)
{
struct mm_struct *mm = &init_mm;
diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c
index 0b6e271efc43..473de3ae8bb7 100644
--- a/arch/riscv/kernel/traps.c
+++ b/arch/riscv/kernel/traps.c
@@ -84,7 +84,7 @@ static void do_trap_error(struct pt_regs *regs, int signo, int code,
}
#define DO_ERROR_INFO(name, signo, code, str) \
-asmlinkage void name(struct pt_regs *regs) \
+asmlinkage __visible void name(struct pt_regs *regs) \
{ \
do_trap_error(regs, signo, code, regs->sepc, "Oops - " str); \
}
@@ -121,7 +121,7 @@ static inline unsigned long get_break_insn_length(unsigned long pc)
return (((insn & __INSN_LENGTH_MASK) == __INSN_LENGTH_32) ? 4UL : 2UL);
}
-asmlinkage void do_trap_break(struct pt_regs *regs)
+asmlinkage __visible void do_trap_break(struct pt_regs *regs)
{
if (user_mode(regs))
force_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->sepc);
--
2.24.0.rc0
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