[PATCH v15 9/9] x86/arch_prctl: Rename 'code' argument to 'option'

From: Kyle Huey
Date: Sat Mar 11 2017 - 14:49:16 EST

arch_prctl arbitrarily changed prctl's 'option' to 'code'. Now that we're
adding additional options, fix that.

Signed-off-by: Kyle Huey <khuey@xxxxxxxxxxxx>
---
arch/um/include/shared/os.h | 2 +-
arch/x86/include/asm/proto.h | 4 ++--
arch/x86/kernel/process.c | 4 ++--
arch/x86/kernel/process_32.c | 4 ++--
arch/x86/kernel/process_64.c | 14 +++++++-------
arch/x86/um/asm/ptrace.h | 2 +-
arch/x86/um/os-Linux/prctl.c | 4 ++--
arch/x86/um/syscalls_32.c | 2 +-
arch/x86/um/syscalls_64.c | 13 +++++++------
include/linux/compat.h | 2 +-
tools/testing/selftests/x86/cpuid_fault.c | 4 ++--
11 files changed, 28 insertions(+), 27 deletions(-)

diff --git a/arch/um/include/shared/os.h b/arch/um/include/shared/os.h
index 2b47e0e8d414..fbabca435e7f 100644
--- a/arch/um/include/shared/os.h
+++ b/arch/um/include/shared/os.h
@@ -298,17 +298,17 @@ extern void os_set_ioignore(void);

/* sigio.c */
extern int add_sigio_fd(int fd);
extern int ignore_sigio_fd(int fd);
extern void maybe_sigio_broken(int fd, int read);
extern void sigio_broken(int fd, int read);

/* sys-x86_64/prctl.c */
-extern int os_arch_prctl(int pid, int code, unsigned long *arg2);
+extern int os_arch_prctl(int pid, int option, unsigned long *arg2);

/* tty.c */
extern int get_pty(void);

/* sys-$ARCH/task_size.c */
extern unsigned long os_get_top_address(void);

long syscall(long number, ...);
diff --git a/arch/x86/include/asm/proto.h b/arch/x86/include/asm/proto.h
index 99836d9a893a..8d3964fc5f91 100644
--- a/arch/x86/include/asm/proto.h
+++ b/arch/x86/include/asm/proto.h
@@ -4,17 +4,17 @@
#include <asm/ldt.h>

/* misc architecture specific prototypes */

void syscall_init(void);

#ifdef CONFIG_X86_64
void entry_SYSCALL_64(void);
-long do_arch_prctl_64(struct task_struct *task, int code, unsigned long arg2);
+long do_arch_prctl_64(struct task_struct *task, int option, unsigned long arg2);
#endif

#ifdef CONFIG_X86_32
void entry_INT80_32(void);
void entry_SYSENTER_32(void);
void __begin_SYSENTER_singlestep_region(void);
void __end_SYSENTER_singlestep_region(void);
#endif
@@ -26,12 +26,12 @@ void entry_SYSCALL_compat(void);
void entry_INT80_compat(void);
#endif

void x86_configure_nx(void);
void x86_report_nx(void);

extern int reboot_force;

-long do_arch_prctl_common(struct task_struct *task, int code,
+long do_arch_prctl_common(struct task_struct *task, int option,
unsigned long cpuid_enabled);

#endif /* _ASM_X86_PROTO_H */
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 37b512493b25..0bb88428cbf2 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -612,20 +612,20 @@ unsigned long get_wchan(struct task_struct *p)
fp = READ_ONCE_NOCHECK(*(unsigned long *)fp);
} while (count++ < 16 && p->state != TASK_RUNNING);

out:
put_task_stack(p);
return ret;
}

-long do_arch_prctl_common(struct task_struct *task, int code,
+long do_arch_prctl_common(struct task_struct *task, int option,
unsigned long cpuid_enabled)
{
- switch (code) {
+ switch (option) {
case ARCH_GET_CPUID:
return get_cpuid_mode();
case ARCH_SET_CPUID:
return set_cpuid_mode(task, cpuid_enabled);
}

return -EINVAL;
}
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index cead0bd41678..ff40e74c9181 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -302,12 +302,12 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
this_cpu_write(current_task, next_p);

/* Load the Intel cache allocation PQR MSR. */
intel_rdt_sched_in();

return prev_p;
}

-SYSCALL_DEFINE2(arch_prctl, int, code, unsigned long, arg2)
+SYSCALL_DEFINE2(arch_prctl, int, option, unsigned long, arg2)
{
- return do_arch_prctl_common(current, code, arg2);
+ return do_arch_prctl_common(current, option, arg2);
}
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index e6749cb2c96d..ea1a6180bf39 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -543,23 +543,23 @@ static long prctl_map_vdso(const struct vdso_image *image, unsigned long addr)
ret = map_vdso_once(image, addr);
if (ret)
return ret;

return (long)image->size;
}
#endif

-long do_arch_prctl_64(struct task_struct *task, int code, unsigned long arg2)
+long do_arch_prctl_64(struct task_struct *task, int option, unsigned long arg2)
{
int ret = 0;
int doit = task == current;
int cpu;

- switch (code) {
+ switch (option) {
case ARCH_SET_GS:
if (arg2 >= TASK_SIZE_MAX)
return -EPERM;
cpu = get_cpu();
task->thread.gsindex = 0;
task->thread.gsbase = arg2;
if (doit) {
load_gs_index(0);
@@ -619,30 +619,30 @@ long do_arch_prctl_64(struct task_struct *task, int code, unsigned long arg2)
default:
ret = -EINVAL;
break;
}

return ret;
}

-SYSCALL_DEFINE2(arch_prctl, int, code, unsigned long, arg2)
+SYSCALL_DEFINE2(arch_prctl, int, option, unsigned long, arg2)
{
long ret;

- ret = do_arch_prctl_64(current, code, arg2);
+ ret = do_arch_prctl_64(current, option, arg2);
if (ret == -EINVAL)
- ret = do_arch_prctl_common(current, code, arg2);
+ ret = do_arch_prctl_common(current, option, arg2);

return ret;
}

#ifdef CONFIG_IA32_EMULATION
-COMPAT_SYSCALL_DEFINE2(arch_prctl, int, code, unsigned long, arg2)
+COMPAT_SYSCALL_DEFINE2(arch_prctl, int, option, unsigned long, arg2)
{
- return do_arch_prctl_common(current, code, arg2);
+ return do_arch_prctl_common(current, option, arg2);
}
#endif

unsigned long KSTK_ESP(struct task_struct *task)
{
return task_pt_regs(task)->sp;
}
diff --git a/arch/x86/um/asm/ptrace.h b/arch/x86/um/asm/ptrace.h
index e59eef20647b..b291ca5cf66b 100644
--- a/arch/x86/um/asm/ptrace.h
+++ b/arch/x86/um/asm/ptrace.h
@@ -73,14 +73,14 @@ static inline int ptrace_get_thread_area(struct task_struct *child, int idx,
}

static inline int ptrace_set_thread_area(struct task_struct *child, int idx,
struct user_desc __user *user_desc)
{
return -ENOSYS;
}

-extern long arch_prctl(struct task_struct *task, int code,
+extern long arch_prctl(struct task_struct *task, int option,
unsigned long __user *addr);

#endif
#define user_stack_pointer(regs) PT_REGS_SP(regs)
#endif /* __UM_X86_PTRACE_H */
diff --git a/arch/x86/um/os-Linux/prctl.c b/arch/x86/um/os-Linux/prctl.c
index efc9d7484e72..8431e87ac333 100644
--- a/arch/x86/um/os-Linux/prctl.c
+++ b/arch/x86/um/os-Linux/prctl.c
@@ -1,12 +1,12 @@
/*
* Copyright (C) 2007 Jeff Dike (jdike@{addtoit.com,linux.intel.com})
* Licensed under the GPL
*/

#include <sys/ptrace.h>
#include <asm/ptrace.h>

-int os_arch_prctl(int pid, int code, unsigned long *arg2)
+int os_arch_prctl(int pid, int option, unsigned long *arg2)
{
- return ptrace(PTRACE_ARCH_PRCTL, pid, (unsigned long) arg2, code);
+ return ptrace(PTRACE_ARCH_PRCTL, pid, (unsigned long) arg2, option);
}
diff --git a/arch/x86/um/syscalls_32.c b/arch/x86/um/syscalls_32.c
index ccf0598c3fc0..627d68836b16 100644
--- a/arch/x86/um/syscalls_32.c
+++ b/arch/x86/um/syscalls_32.c
@@ -1,7 +1,7 @@
#include <linux/syscalls.h>
#include <os.h>

-SYSCALL_DEFINE2(arch_prctl, int, code, unsigned long, arg2)
+SYSCALL_DEFINE2(arch_prctl, int, option, unsigned long, arg2)
{
return -EINVAL;
}
diff --git a/arch/x86/um/syscalls_64.c b/arch/x86/um/syscalls_64.c
index f73ec5c35eb0..58f51667e2e4 100644
--- a/arch/x86/um/syscalls_64.c
+++ b/arch/x86/um/syscalls_64.c
@@ -7,17 +7,18 @@

#include <linux/sched.h>
#include <linux/sched/mm.h>
#include <linux/syscalls.h>
#include <linux/uaccess.h>
#include <asm/prctl.h> /* XXX This should get the constants from libc */
#include <os.h>

-long arch_prctl(struct task_struct *task, int code, unsigned long __user *arg2)
+long arch_prctl(struct task_struct *task, int option,
+ unsigned long __user *arg2)
{
unsigned long *ptr = arg2, tmp;
long ret;
int pid = task->mm->context.id.u.pid;

/*
* With ARCH_SET_FS (and ARCH_SET_GS is treated similarly to
* be safe), we need to call arch_prctl on the host because
@@ -26,17 +27,17 @@ long arch_prctl(struct task_struct *task, int code, unsigned long __user *arg2)
* fiddle the registers and thread struct and restore the
* registers afterwards.
*
* So, the saved registers are stored to the process (this
* needed because a stub may have been the last thing to run),
* arch_prctl is run on the host, then the registers are read
* back.
*/
- switch (code) {
+ switch (option) {
case ARCH_SET_FS:
case ARCH_SET_GS:
ret = restore_registers(pid, &current->thread.regs.regs);
if (ret)
return ret;
break;
case ARCH_GET_FS:
case ARCH_GET_GS:
@@ -46,21 +47,21 @@ long arch_prctl(struct task_struct *task, int code, unsigned long __user *arg2)
* given. If addr isn't valid (because it hasn't been
* faulted in or is just bogus), we want put_user to
* fault it in (or return -EFAULT) instead of having
* the host return -EFAULT.
*/
ptr = &tmp;
}

- ret = os_arch_prctl(pid, code, ptr);
+ ret = os_arch_prctl(pid, option, ptr);
if (ret)
return ret;

- switch (code) {
+ switch (option) {
case ARCH_SET_FS:
current->thread.arch.fs = (unsigned long) ptr;
ret = save_registers(pid, &current->thread.regs.regs);
break;
case ARCH_SET_GS:
ret = save_registers(pid, &current->thread.regs.regs);
break;
case ARCH_GET_FS:
@@ -69,19 +70,19 @@ long arch_prctl(struct task_struct *task, int code, unsigned long __user *arg2)
case ARCH_GET_GS:
ret = put_user(tmp, arg2);
break;
}

return ret;
}

-SYSCALL_DEFINE2(arch_prctl, int, code, unsigned long, arg2)
+SYSCALL_DEFINE2(arch_prctl, int, option, unsigned long, arg2)
{
- return arch_prctl(current, code, (unsigned long __user *) arg2);
+ return arch_prctl(current, option, (unsigned long __user *) arg2);
}

void arch_switch_to(struct task_struct *to)
{
if ((to->thread.arch.fs == 0) || (to->mm == NULL))
return;

arch_prctl(to, ARCH_SET_FS, (void __user *) to->thread.arch.fs);
diff --git a/include/linux/compat.h b/include/linux/compat.h
index 890f4284a5fd..af9dbc44fd92 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -718,17 +718,17 @@ int __compat_save_altstack(compat_stack_t __user *, unsigned long);
} while (0);

asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
struct compat_timespec __user *interval);

asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
int, const char __user *);

-asmlinkage long compat_sys_arch_prctl(int code, unsigned long arg2);
+asmlinkage long compat_sys_arch_prctl(int option, unsigned long arg2);

/*
* For most but not all architectures, "am I in a compat syscall?" and
* "am I a compat task?" are the same question. For architectures on which
* they aren't the same question, arch code can override in_compat_syscall.
*/

#ifndef in_compat_syscall
diff --git a/tools/testing/selftests/x86/cpuid_fault.c b/tools/testing/selftests/x86/cpuid_fault.c
index 36963e170fed..e3b93c28c655 100644
--- a/tools/testing/selftests/x86/cpuid_fault.c
+++ b/tools/testing/selftests/x86/cpuid_fault.c
@@ -28,19 +28,19 @@
#endif
*/

const char *cpuid_names[] = {
[0] = "[cpuid disabled]",
[1] = "[cpuid enabled]",
};

-int arch_prctl(int code, unsigned long arg2)
+int arch_prctl(int option, unsigned long arg2)
{
- return syscall(SYS_arch_prctl, code, arg2);
+ return syscall(SYS_arch_prctl, option, arg2);
}

int cpuid(unsigned int *eax, unsigned int *ebx, unsigned int *ecx,
unsigned int *edx)
{
return __get_cpuid(0, eax, ebx, ecx, edx);
}

--
2.11.0