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2018-05-08doc: botching-up-ioctls: Make it clearer why structs must be paddedDaniel Vetter
This came up in discussions when reviewing drm patches. Reviewed-by: Eric Anholt <eric@anholt.net> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-01-26Doc: Fix double words in DocumentationMasanari Iida
This patch fix some double words found in Documentation. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-09-06doc: ioctl: Add some clarifications to botching-up-ioctlsLaura Abbott
- The guide currently says to pad the structure to a multiple of 64-bits. This is not necessary in cases where the structure contains no 64-bit types. Clarify this concept to avoid unnecessary padding. - When using __u64 to hold user pointers, blindly trying to do a cast to a void __user * may generate a warning on 32-bit systems about a cast from an integer to a pointer of different size. There is a macro to deal with this which hides an ugly double cast. Add a reference to this macro. Signed-off-by: Laura Abbott <labbott@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2015-11-20Doc: ioctl: Fix typos in Documentation/ioctlMasanari Iida
This patch fix some spelling typos in Documentation/ioctl. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2014-08-09Documentation: add How to avoid botching up ioctlsMichael Ellerman
I pointed some folks at this and they wondered why it wasn't in the kernel Documentation directory. So now it is. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>