• Linus Torvalds's avatar
    [watchdog] hpwdt: fix use of inline assembly · 1f6ef234
    Linus Torvalds authored
    The inline assembly in drivers/watchdog/hpwdt.c was incredibly broken,
    and included all the function prologue and epilogue stuff, even though
    it was itself then inside a C function where the compiler would add its
    own prologue and epilogue on top of it all.
    
    This then just _happened_ to work if you had exactly the right compiler
    version and exactly the right compiler flags, so that gcc just happened
    to not create any prologue at all (the gcc-generated epilogue wouldn't
    matter, since it would never be reached).
    
    But the more proper way to fix it is to simply not do this.  Move the
    inline asm to the top level, with no surrounding function at all (the
    better alternative would be to remove the prologue and make it actually
    use proper description of the arguments to the inline asm, but that's a
    bigger change than the one I'm willing to make right now).
    Tested-by: default avatarS.Çağlar Onur <caglar@pardus.org.tr>
    Acked-by: default avatarThomas Mingarelli <Thomas.Mingarelli@hp.com>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    1f6ef234
hpwdt.c 17.6 KB