• Jason Baron's avatar
    jump label: Base patch for jump label · bf5438fc
    Jason Baron authored
    base patch to implement 'jump labeling'. Based on a new 'asm goto' inline
    assembly gcc mechanism, we can now branch to labels from an 'asm goto'
    statment. This allows us to create a 'no-op' fastpath, which can subsequently
    be patched with a jump to the slowpath code. This is useful for code which
    might be rarely used, but which we'd like to be able to call, if needed.
    Tracepoints are the current usecase that these are being implemented for.
    Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
    Signed-off-by: default avatarJason Baron <jbaron@redhat.com>
    LKML-Reference: <ee8b3595967989fdaf84e698dc7447d315ce972a.1284733808.git.jbaron@redhat.com>
    
    [ cleaned up some formating ]
    Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
    bf5438fc
gcc-goto.sh 223 Bytes