From: tip-bot for Andy Lutomirski <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: tglx@linutronix.de, linux-kernel@vger.kernel.org, bp@alien8.de,
mingo@kernel.org, hpa@zytor.com, luto@kernel.org,
brgerst@gmail.com, eparis@parisplace.org, dvlasenk@redhat.com,
peterz@infradead.org, oleg@redhat.com,
torvalds@linux-foundation.org
Subject: [tip:x86/asm] x86/entry: Remove do_notify_resume(), syscall_trace_leave(), and their TIF masks
Date: Wed, 5 Aug 2015 13:15:53 -0700 [thread overview]
Message-ID: <tip-88cd622f9299c4c9e61e978bb9ef9d7599769ed0@git.kernel.org> (raw)
In-Reply-To: <22c61682f446628573dde0f1d573ab821677e06da.1438378274.git.luto@kernel.org>
Commit-ID: 88cd622f9299c4c9e61e978bb9ef9d7599769ed0
Gitweb: http://git.kernel.org/tip/88cd622f9299c4c9e61e978bb9ef9d7599769ed0
Author: Andy Lutomirski <luto@kernel.org>
AuthorDate: Fri, 31 Jul 2015 14:41:10 -0700
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Wed, 5 Aug 2015 10:54:35 +0200
x86/entry: Remove do_notify_resume(), syscall_trace_leave(), and their TIF masks
They are no longer used. Good riddance!
Deleting the TIF_ macros is really nice. It was never clear why
there were so many variants.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Eric Paris <eparis@parisplace.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/22c61682f446628573dde0f1d573ab821677e06da.1438378274.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
arch/x86/entry/common.c | 57 --------------------------------------
arch/x86/include/asm/ptrace.h | 1 -
arch/x86/include/asm/signal.h | 1 -
arch/x86/include/asm/thread_info.h | 16 -----------
4 files changed, 75 deletions(-)
diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
index a3e9c7f..80dcc92 100644
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -207,37 +207,6 @@ long syscall_trace_enter(struct pt_regs *regs)
return syscall_trace_enter_phase2(regs, arch, phase1_result);
}
-/* Deprecated. */
-void syscall_trace_leave(struct pt_regs *regs)
-{
- bool step;
-
- /*
- * We may come here right after calling schedule_user()
- * or do_notify_resume(), in which case we can be in RCU
- * user mode.
- */
- user_exit();
-
- audit_syscall_exit(regs);
-
- if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
- trace_sys_exit(regs, regs->ax);
-
- /*
- * If TIF_SYSCALL_EMU is set, we only get here because of
- * TIF_SINGLESTEP (i.e. this is PTRACE_SYSEMU_SINGLESTEP).
- * We already reported this syscall instruction in
- * syscall_trace_enter().
- */
- step = unlikely(test_thread_flag(TIF_SINGLESTEP)) &&
- !test_thread_flag(TIF_SYSCALL_EMU);
- if (step || test_thread_flag(TIF_SYSCALL_TRACE))
- tracehook_report_syscall_exit(regs, step);
-
- user_enter();
-}
-
static struct thread_info *pt_regs_to_thread_info(struct pt_regs *regs)
{
unsigned long top_of_stack =
@@ -347,29 +316,3 @@ __visible void syscall_return_slowpath(struct pt_regs *regs)
local_irq_disable();
prepare_exit_to_usermode(regs);
}
-
-/*
- * Deprecated notification of userspace execution resumption
- * - triggered by the TIF_WORK_MASK flags
- */
-__visible void
-do_notify_resume(struct pt_regs *regs, void *unused, __u32 thread_info_flags)
-{
- user_exit();
-
- if (thread_info_flags & _TIF_UPROBE)
- uprobe_notify_resume(regs);
-
- /* deal with pending signal delivery */
- if (thread_info_flags & _TIF_SIGPENDING)
- do_signal(regs);
-
- if (thread_info_flags & _TIF_NOTIFY_RESUME) {
- clear_thread_flag(TIF_NOTIFY_RESUME);
- tracehook_notify_resume(regs);
- }
- if (thread_info_flags & _TIF_USER_RETURN_NOTIFY)
- fire_user_return_notifiers();
-
- user_enter();
-}
diff --git a/arch/x86/include/asm/ptrace.h b/arch/x86/include/asm/ptrace.h
index 5fabf13..6271281 100644
--- a/arch/x86/include/asm/ptrace.h
+++ b/arch/x86/include/asm/ptrace.h
@@ -88,7 +88,6 @@ extern long syscall_trace_enter_phase2(struct pt_regs *, u32 arch,
unsigned long phase1_result);
extern long syscall_trace_enter(struct pt_regs *);
-extern void syscall_trace_leave(struct pt_regs *);
static inline unsigned long regs_return_value(struct pt_regs *regs)
{
diff --git a/arch/x86/include/asm/signal.h b/arch/x86/include/asm/signal.h
index b42408b..c481be7 100644
--- a/arch/x86/include/asm/signal.h
+++ b/arch/x86/include/asm/signal.h
@@ -31,7 +31,6 @@ typedef sigset_t compat_sigset_t;
#include <uapi/asm/signal.h>
#ifndef __ASSEMBLY__
extern void do_signal(struct pt_regs *regs);
-extern void do_notify_resume(struct pt_regs *, void *, __u32);
#define __ARCH_HAS_SA_RESTORER
diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h
index fdad5c2..8afdc3e 100644
--- a/arch/x86/include/asm/thread_info.h
+++ b/arch/x86/include/asm/thread_info.h
@@ -143,27 +143,11 @@ struct thread_info {
_TIF_SECCOMP | _TIF_SINGLESTEP | _TIF_SYSCALL_TRACEPOINT | \
_TIF_NOHZ)
-/* work to do in syscall_trace_leave() */
-#define _TIF_WORK_SYSCALL_EXIT \
- (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP | \
- _TIF_SYSCALL_TRACEPOINT | _TIF_NOHZ)
-
-/* work to do on interrupt/exception return */
-#define _TIF_WORK_MASK \
- (0x0000FFFF & \
- ~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT| \
- _TIF_SINGLESTEP|_TIF_SECCOMP|_TIF_SYSCALL_EMU))
-
/* work to do on any return to user space */
#define _TIF_ALLWORK_MASK \
((0x0000FFFF & ~_TIF_SECCOMP) | _TIF_SYSCALL_TRACEPOINT | \
_TIF_NOHZ)
-/* Only used for 64 bit */
-#define _TIF_DO_NOTIFY_MASK \
- (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \
- _TIF_USER_RETURN_NOTIFY | _TIF_UPROBE)
-
/* flags to check in __switch_to() */
#define _TIF_WORK_CTXSW \
(_TIF_IO_BITMAP|_TIF_NOTSC|_TIF_BLOCKSTEP)
prev parent reply other threads:[~2015-08-05 20:16 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-31 21:41 [PATCH 0/3] x86/entry: 32-bit C exit conversion and code deletion Andy Lutomirski
2015-07-31 21:41 ` [PATCH 1/3] x86/entry/32: Remove 32-bit syscall audit optimizations Andy Lutomirski
2015-08-05 20:15 ` [tip:x86/asm] " tip-bot for Andy Lutomirski
2015-07-31 21:41 ` [PATCH 2/3] x86/entry/32: Migrate to C exit path Andy Lutomirski
2015-08-05 20:15 ` [tip:x86/asm] " tip-bot for Andy Lutomirski
2015-07-31 21:41 ` [PATCH 3/3] x86/entry: Remove do_notify_resume, syscall_trace_leave, and their TIF masks Andy Lutomirski
2015-08-05 20:15 ` tip-bot for Andy Lutomirski [this message]
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