• Linus Torvalds's avatar
    mm: remove more IS_ERR_VALUE abuses · 5d22fc25
    Linus Torvalds authored
    The do_brk() and vm_brk() return value was "unsigned long" and returned
    the starting address on success, and an error value on failure.  The
    reasons are entirely historical, and go back to it basically behaving
    like the mmap() interface does.
    
    However, nobody actually wanted that interface, and it causes totally
    pointless IS_ERR_VALUE() confusion.
    
    What every single caller actually wants is just the simpler integer
    return of zero for success and negative error number on failure.
    
    So just convert to that much clearer and more common calling convention,
    and get rid of all the IS_ERR_VALUE() uses wrt vm_brk().
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    5d22fc25
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