[PATCH 0/6] Sanity checks for ERR_PTR argument

[Marcin Slusarz]

This little patchset adds sanity checks to ERR_PTR.

[PATCH 1/6] ERR_PTR: if errno value is known at compile time, make sure it's valid
[PATCH 2/6] ERR_PTR: add ERR_OR_0_PTR
[PATCH 3/6] vfs: open_exec cleanup
[PATCH 4/6] procfs: switch ERR_PTR to ERR_OR_0_PTR when "error" might be 0
[PATCH 5/6] vfs: fix ERR_PTR abuse in generic_readlink
[PATCH 6/6] ERR_PTR: warn when ERR_PTR parameter is not errno value

The most important are patches 1 and 6. 2nd patch adds another ERR_PTR-like helper.
The rest (3-5) fix false positives found by 6th patch.

---
 fs/exec.c           |   44 ++++++++++++++++++++++----------------------
 fs/namei.c          |   15 ++++++++-------
 fs/proc/base.c      |    4 ++--
 include/linux/err.h |   14 +++++++++++++-
 4 files changed, 45 insertions(+), 32 deletions(-)
---
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