• Rabin Vincent's avatar
    ARM: 7351/1: ftrace: remove useless memory checks · dc283d70
    Rabin Vincent authored
    Before replacing an instruction, the ftrace code determines what the old
    instruction should be and verifies that that's what's really there in
    memory before replacing it.  This is useful if for example a bug in
    mcountrecord causes it to record wrong locations.
    However, in cases where we replace call sites in entry-common.S, these
    checks are not needed.  For these, we currently just memcpy() the memory
    content and then "verify" it -- this is quite useless and can be
    Signed-off-by: default avatarRabin Vincent <rabin@rab.in>
    Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
ftrace.c 6.4 KB