Commit Graph

6 Commits

Author SHA1 Message Date
Josh Poimboeuf
ff44a0af26 core/kmod: use kmalloc instead of kzalloc
There's no need to zero out the kpatch funcs array.  The addr fields are
initialized by the patch module, the mod field is intialized by the core
module, and the node struct doesn't need to be initialized because its
fields are overwritten by hash_add.
2014-03-18 16:57:51 -05:00
Josh Poimboeuf
bfad3b1880 kmod/core: update API and use hash table
My apologies for the size of this commit.  I combined these two features
(updating API and using a hash table) into a single commit because their
implementations are tightly coupled and I didn't want to have to add
support for the old kpatch_funcs array with the new API just for the
sake of splitting up the commit :-)

- Update the core module API to get a more clear separation between core
  module and patch module.  This is cleaner and will help our case for
  getting the core module merged upstream into the kernel.
- Convert the old kpatch_funcs array into a hash table.  This is so much
  nicer performance-wise and everything-else-wise than that ugly old
  array.
- Do the incremental patching in stop machine.  This ensures that the
  funcs hash is up to date and we don't miss anything.
- Disable preemption in the ftrace handler when accessing the func hash.
  That way we don't get conflicts with the stop_machine handler updating
  the hash.
2014-03-18 13:34:15 -05:00
Josh Poimboeuf
b81e2d607b kmod/core: print module load/unload messages
Print the loading/unloading messages after they have successfully
completed.  Using the KERN_NOTICE log level which corresponds to a
"normal but significant condition."
2014-03-14 20:23:12 -05:00
Josh Poimboeuf
330a08dd0d add GPLv2 headers to source files 2014-03-04 21:34:19 -06:00
Josh Poimboeuf
8085d0402b build and install core module with make
Build and install the kpatch core module with make and make install,
rather than building it every time with kpatch build.

The only downside to this approach is that the user has to make and make
install kpatch every time they get a new kernel.  But this is only
temporary, until the kpatch module is delivered in an RPM.
2014-02-18 07:44:33 -06:00
Josh Poimboeuf
4f27b9ae31 functional reorganization
Organize the files functionally:
- kmod/core: core kmod source
- kmod/patch: patch kmod source
- kpatch: kpatch script
- kpatch-build: kpatch build script and supporting tools
- contrib: distro-related files
2014-02-13 11:00:06 -06:00