1 Linux Kernel patch submission checklist
2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4 Here are some basic things that developers should do if they want to see their
5 kernel patch submissions accepted more quickly.
7 These are all above and beyond the documentation that is provided in
8 Documentation/SubmittingPatches and elsewhere regarding submitting Linux
12 1: Builds cleanly with applicable or modified CONFIG options =y, =m, and
13 =n. No gcc warnings/errors, no linker warnings/errors.
15 2: Passes allnoconfig, allmodconfig
17 3: Builds on multiple CPU architectures by using local cross-compile tools
18 or some other build farm.
20 4: ppc64 is a good architecture for cross-compilation checking because it
21 tends to use `unsigned long' for 64-bit quantities.
23 5: Check your patch for general style as detailed in
24 Documentation/CodingStyle. Check for trivial violations with the
25 patch style checker prior to submission (scripts/checkpatch.pl).
26 You should be able to justify all violations that remain in
29 6: Any new or modified CONFIG options don't muck up the config menu.
31 7: All new Kconfig options have help text.
33 8: Has been carefully reviewed with respect to relevant Kconfig
34 combinations. This is very hard to get right with testing -- brainpower
37 9: Check cleanly with sparse.
39 10: Use 'make checkstack' and 'make namespacecheck' and fix any problems
40 that they find. Note: checkstack does not point out problems explicitly,
41 but any one function that uses more than 512 bytes on the stack is a
44 11: Include kernel-doc to document global kernel APIs. (Not required for
45 static functions, but OK there also.) Use 'make htmldocs' or 'make
46 mandocs' to check the kernel-doc and fix any issues.
48 12: Has been tested with CONFIG_PREEMPT, CONFIG_DEBUG_PREEMPT,
49 CONFIG_DEBUG_SLAB, CONFIG_DEBUG_PAGEALLOC, CONFIG_DEBUG_MUTEXES,
50 CONFIG_DEBUG_SPINLOCK, CONFIG_DEBUG_SPINLOCK_SLEEP all simultaneously
53 13: Has been build- and runtime tested with and without CONFIG_SMP and
56 14: If the patch affects IO/Disk, etc: has been tested with and without
59 15: All codepaths have been exercised with all lockdep features enabled.
61 16: All new /proc entries are documented under Documentation/
63 17: All new kernel boot parameters are documented in
64 Documentation/kernel-parameters.txt.
66 18: All new module parameters are documented with MODULE_PARM_DESC()
68 19: All new userspace interfaces are documented in Documentation/ABI/.
69 See Documentation/ABI/README for more information.
70 Patches that change userspace interfaces should be CCed to
71 linux-api@vger.kernel.org.
73 20: Check that it all passes `make headers_check'.
75 21: Has been checked with injection of at least slab and page-allocation
76 failures. See Documentation/fault-injection/.
78 If the new code is substantial, addition of subsystem-specific fault
79 injection might be appropriate.
81 22: Newly-added code has been compiled with `gcc -W' (use "make
82 EXTRA_CFLAGS=-W"). This will generate lots of noise, but is good for
83 finding bugs like "warning: comparison between signed and unsigned".
85 23: Tested after it has been merged into the -mm patchset to make sure
86 that it still works with all of the other queued patches and various
87 changes in the VM, VFS, and other subsystems.
89 24: All memory barriers {e.g., barrier(), rmb(), wmb()} need a comment in the
90 source code that explains the logic of what they are doing and why.
92 25: If any ioctl's are added by the patch, then also update
93 Documentation/ioctl/ioctl-number.txt.