Commit-ID: 72f924783b8a87e4454516520ffb5f35e4930371 Gitweb: http://git.kernel.org/tip/72f924783b8a87e4454516520ffb5f35e4930371 Author: Andy Lutomirski <luto@xxxxxxxxxx> AuthorDate: Mon, 5 Oct 2015 17:47:54 -0700 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitDate: Wed, 7 Oct 2015 11:34:07 +0200 x86/entry, locking/lockdep: Move lockdep_sys_exit() to prepare_exit_to_usermode() Rather than worrying about exactly where LOCKDEP_SYS_EXIT should go in the asm code, add it to prepare_exit_from_usermode() and remove all of the asm calls that are followed by prepare_exit_to_usermode(). LOCKDEP_SYS_EXIT now appears only in the syscall fast paths. Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx> Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxxxx> Cc: Brian Gerst <brgerst@xxxxxxxxx> Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx> Cc: H. Peter Anvin <hpa@xxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: linux-kernel@xxxxxxxxxxxxxxx Link: http://lkml.kernel.org/r/1736ebe948b845e68120b86b89091f3ec27f5e8e.1444091584.git.luto@xxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- arch/x86/entry/common.c | 2 ++ arch/x86/entry/entry_32.S | 2 -- arch/x86/entry/entry_64.S | 1 - 3 files changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c index 80dcc92..d94a60c 100644 --- a/arch/x86/entry/common.c +++ b/arch/x86/entry/common.c @@ -220,6 +220,8 @@ __visible void prepare_exit_to_usermode(struct pt_regs *regs) if (WARN_ON(!irqs_disabled())) local_irq_disable(); + lockdep_sys_exit(); + /* * In order to return to user mode, we need to have IRQs off with * none of _TIF_SIGPENDING, _TIF_NOTIFY_RESUME, _TIF_USER_RETURN_NOTIFY, diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S index b2909bf..a08ded4 100644 --- a/arch/x86/entry/entry_32.S +++ b/arch/x86/entry/entry_32.S @@ -255,7 +255,6 @@ ret_from_intr: jb resume_kernel # not returning to v8086 or userspace ENTRY(resume_userspace) - LOCKDEP_SYS_EXIT DISABLE_INTERRUPTS(CLBR_ANY) TRACE_IRQS_OFF movl %esp, %eax @@ -372,7 +371,6 @@ syscall_call: syscall_after_call: movl %eax, PT_EAX(%esp) # store the return value syscall_exit: - LOCKDEP_SYS_EXIT jmp syscall_exit_work restore_all: diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index 055a01d..7dc2850 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -557,7 +557,6 @@ ret_from_intr: jz retint_kernel /* Interrupt came from user space */ - LOCKDEP_SYS_EXIT_IRQ GLOBAL(retint_user) mov %rsp,%rdi call prepare_exit_to_usermode -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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