• Stefani Seibold's avatar
    kfifo API type safety · 498d319b
    Stefani Seibold authored
    This patch enhances the type safety for the kfifo API.  It is now safe
    to put const data into a non const FIFO and the API will now generate a
    compiler warning when reading from the fifo where the destination
    address is pointing to a const variable.
    
    As a side effect the kfifo_put() does now expect the value of an element
    instead a pointer to the element.  This was suggested Russell King.  It
    make the handling of the kfifo_put easier since there is no need to
    create a helper variable for getting the address of a pointer or to pass
    integers of different sizes.
    
    IMHO the API break is okay, since there are currently only six users of
    kfifo_put().
    
    The code is also cleaner by kicking out the "if (0)" expressions.
    
    [akpm@linux-foundation.org: coding-style fixes]
    Signed-off-by: default avatarStefani Seibold <stefani@seibold.net>
    Cc: Russell King <rmk@arm.linux.org.uk>
    Cc: Hauke Mehrtens <hauke@hauke-m.de>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    498d319b
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