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Jori KoolstraandChristian Brauner
0da79c259a
A recent build failure[1] exposed the diffculty of working with the
current octal and hex definitions of O_ flags when trying to find a gap
for a new flag. This difficulty is compounded by the fact that O_ flags
may have architectural specific values.
Replace the hex/octal #defines, which are hard to parse when looking for
free bits, with explicit bit shifts like (1 << 11). Also, add comments
that identify which architectures redefine some of the seemingly free
("cursed") bits in uapi/asm-generic/fcntl.h. These should not be used to
define new O_ flags (for now, at least).
The translastion was done with Claude Opus 4.8, and verified with a
(non-AI) gawk script. The accounting of which architectures claim
which bit-gaps in uapi/asm-generic/fcntl.h is also done by hand.
[1]: https://lore.kernel.org/all/agruPPybCx8q2XcJ@sirena.org.uk/
Assisted-by: Claude:Opus 4.8
Signed-off-by: Jori Koolstra <jkoolstra@xs4all.nl>
Link: https://patch.msgid.link/20260604222405.5382-1-jkoolstra@xs4all.nl
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
13 lines
363 B
C
13 lines
363 B
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _ARM_FCNTL_H
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#define _ARM_FCNTL_H
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#define O_DIRECTORY (1 << 14) /* must be a directory */
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#define O_NOFOLLOW (1 << 15) /* don't follow links */
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#define O_DIRECT (1 << 16) /* direct disk access hint - currently ignored */
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#define O_LARGEFILE (1 << 17)
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#include <asm-generic/fcntl.h>
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#endif
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