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Merge tag 'kernel-clone-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux

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Pull kernel_clone() updates from Christian Brauner:
 "During the v5.9 merge window we reworked the process creation
  codepaths across multiple architectures. After this work we were only
  left with the _do_fork() helper based on the struct kernel_clone_args
  calling convention. As was pointed out _do_fork() isn't valid
  kernelese especially for a helper that isn't just static.

  This series removes the _do_fork() helper and introduces the new
  kernel_clone() helper. The process creation cleanup didn't change the
  name to something more reasonable mainly because _do_fork() was used
  in quite a few places. So sending this as a separate series seemed the
  better strategy.

  I originally intended to send this early in the v5.9 development cycle
  after the merge window had closed but given that this was touching
  quite a few places I decided to defer this until the v5.10 merge
  window"

* tag 'kernel-clone-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  sched: remove _do_fork()
  tracing: switch to kernel_clone()
  kgdbts: switch to kernel_clone()
  kprobes: switch to kernel_clone()
  x86: switch to kernel_clone()
  sparc: switch to kernel_clone()
  nios2: switch to kernel_clone()
  m68k: switch to kernel_clone()
  ia64: switch to kernel_clone()
  h8300: switch to kernel_clone()
  fork: introduce kernel_clone()
This commit is contained in:
Linus Torvalds
2020-10-14 14:32:52 -07:00
parent 9e51183e94 06fe456349
commit 612e7a4c16
28 changed files with 88 additions and 88 deletions
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6
samples/kprobes/kprobe_example.c
View File

@@ -2,13 +2,13 @@
/*
* NOTE: This example is works on x86 and powerpc.
* Here's a sample kernel module showing the use of kprobes to dump a
* stack trace and selected registers when _do_fork() is called.
* stack trace and selected registers when kernel_clone() is called.
*
* For more information on theory of operation of kprobes, see
* Documentation/trace/kprobes.rst
*
* You will see the trace data in /var/log/messages and on the console
* whenever _do_fork() is invoked to create a new process.
* whenever kernel_clone() is invoked to create a new process.
*/
#include <linux/kernel.h>
@@ -16,7 +16,7 @@
#include <linux/kprobes.h>
#define MAX_SYMBOL_LEN 64
static char symbol[MAX_SYMBOL_LEN] = "_do_fork";
static char symbol[MAX_SYMBOL_LEN] = "kernel_clone";
module_param_string(symbol, symbol, sizeof(symbol), 0644);
/* For each probe you need to allocate a kprobe structure */

4
samples/kprobes/kretprobe_example.c
View File

@@ -8,7 +8,7 @@
*
* usage: insmod kretprobe_example.ko func=<func_name>
*
* If no func_name is specified, _do_fork is instrumented
* If no func_name is specified, kernel_clone is instrumented
*
* For more information on theory of operation of kretprobes, see
* Documentation/trace/kprobes.rst
@@ -26,7 +26,7 @@
#include <linux/limits.h>
#include <linux/sched.h>
static char func_name[NAME_MAX] = "_do_fork";
static char func_name[NAME_MAX] = "kernel_clone";
module_param_string(func, func_name, NAME_MAX, S_IRUGO);
MODULE_PARM_DESC(func, "Function to kretprobe; this module will report the"
" function's execution time");