linux-kernel - [PATCH] tracehook: fix documentation for tracehook_report_syscall

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Message-ID: <20181110042209.26333972@akathisia>
Date:   Sat, 10 Nov 2018 04:22:09 +0100
From:   Elvira Khabirova <lineprinter@...linux.org>
To:     oleg@...hat.com, mingo@...hat.com, rostedt@...dmis.org
Cc:     linux-kernel@...r.kernel.org, ldv@...linux.org
Subject: [PATCH] tracehook: fix documentation for
 tracehook_report_syscall_entry()

tracehook_report_syscall_entry() is called not only
if %TIF_SYSCALL_TRACE is set, but also if %TIF_SYSCALL_EMU is set,
as appears from x86's entry code.

Signed-off-by: Elvira Khabirova <lineprinter@...linux.org>
---
 include/linux/tracehook.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h
index 40b0b4c1bf7b..df20f8bdbfa3 100644
--- a/include/linux/tracehook.h
+++ b/include/linux/tracehook.h
@@ -83,8 +83,8 @@ static inline int ptrace_report_syscall(struct pt_regs *regs)
  * tracehook_report_syscall_entry - task is about to attempt a system call
  * @regs:		user register state of current task
  *
- * This will be called if %TIF_SYSCALL_TRACE has been set, when the
- * current task has just entered the kernel for a system call.
+ * This will be called if %TIF_SYSCALL_TRACE or %TIF_SYSCALL_EMU have been set,
+ * when the current task has just entered the kernel for a system call.
  * Full user register state is available here.  Changing the values
  * in @regs can affect the system call number and arguments to be tried.
  * It is safe to block here, preventing the system call from beginning.
-- 
2.19.1