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63d72b93f2
posix_acl_permission() does not care about MAY_NOT_BLOCK, and in fact the permission logic internally must not check that bit (it's only for upper layers to decide whether they can block to do IO to look up the acl information or not). But the way the code was written, it _looked_ like it cared, since the function explicitly did not mask that bit off. But it has exactly two callers: one for when that bit is set, which first clears the bit before calling posix_acl_permission(), and the other call site when that bit was clear. So stop the silly games "saving" the MAY_NOT_BLOCK bit that must not be used for the actual permission test, and that currently is pointlessly cleared by the callers when the function itself should just not care. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.