[PATCH 0/2] fix ftrace initialization issue when a module is loaded

From	"Qiu, PeiyangX" <peiyangx.qiu@intel.com>
Newsgroups	linux.kernel
Subject	[PATCH 0/2] fix ftrace initialization issue when a module is loaded
Date	2015-12-25 07:30 +0100
Message-ID	<qJu2Z-8rQ-1@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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When a module is loaded, current ftrace initialization around the new module
has some issues.

1) ftrace might race with insmod: Just after load_module calls
ftrace_module_init to add ftrace records of the module, ftrace_run_update_code
might jump in to change module codes. But load_module calls
complete_formation=>set_section_ro_nx to put the module TEXT attribute to RO.
Then, ftrace_run_update_code triggers ftrace_bug and fails.

2) complete_formation might fail and the module's ftrace records are not
cleaned up.

This patchset fixes above issues.
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[PATCH 0/2] fix ftrace initialization issue when a module is loaded "Qiu, PeiyangX" <peiyangx.qiu@intel.com> - 2015-12-25 07:30 +0100
  [PATCH 1/2] ftrace: fix the race between ftrace and insmod "Qiu, PeiyangX" <peiyangx.qiu@intel.com> - 2015-12-25 07:50 +0100
  [PATCH 2/2] module: deal with the failure of complete_formation "Qiu, PeiyangX" <peiyangx.qiu@intel.com> - 2015-12-25 08:10 +0100
  [PATCH 1/2] ftrace: fix the race between ftrace and insmod "Qiu, PeiyangX" <peiyangx.qiu@intel.com> - 2015-12-25 08:10 +0100

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