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    Subject[PATCH v21 043/100] c/r: add generic '->checkpoint()' f_op to simple devices
    Date
    * /dev/null
    * /dev/zero
    * /dev/random
    * /dev/urandom

    Changelog [v21]:
    - Put file_ops->checkpoint under CONFIG_CHECKPOINT

    Cc: linux-fsdevel@vger.kernel.org
    Signed-off-by: Oren Laadan <orenl@cs.columbia.edu>
    Acked-by: Serge E. Hallyn <serue@us.ibm.com>
    Tested-by: Serge E. Hallyn <serue@us.ibm.com>
    ---
    drivers/char/mem.c | 6 ++++++
    drivers/char/random.c | 6 ++++++
    2 files changed, 12 insertions(+), 0 deletions(-)

    diff --git a/drivers/char/mem.c b/drivers/char/mem.c
    index f54dab8..4e48384 100644
    --- a/drivers/char/mem.c
    +++ b/drivers/char/mem.c
    @@ -767,6 +767,9 @@ static const struct file_operations null_fops = {
    .read = read_null,
    .write = write_null,
    .splice_write = splice_write_null,
    +#ifdef CONFIG_CHECKPOINT
    + .checkpoint = generic_file_checkpoint,
    +#endif
    };

    #ifdef CONFIG_DEVPORT
    @@ -783,6 +786,9 @@ static const struct file_operations zero_fops = {
    .read = read_zero,
    .write = write_zero,
    .mmap = mmap_zero,
    +#ifdef CONFIG_CHECKPOINT
    + .checkpoint = generic_file_checkpoint,
    +#endif
    };

    /*
    diff --git a/drivers/char/random.c b/drivers/char/random.c
    index 2fd3d39..47a224c 100644
    --- a/drivers/char/random.c
    +++ b/drivers/char/random.c
    @@ -1169,6 +1169,9 @@ const struct file_operations random_fops = {
    .poll = random_poll,
    .unlocked_ioctl = random_ioctl,
    .fasync = random_fasync,
    +#ifdef CONFIG_CHECKPOINT
    + .checkpoint = generic_file_checkpoint,
    +#endif
    };

    const struct file_operations urandom_fops = {
    @@ -1176,6 +1179,9 @@ const struct file_operations urandom_fops = {
    .write = random_write,
    .unlocked_ioctl = random_ioctl,
    .fasync = random_fasync,
    +#ifdef CONFIG_CHECKPOINT
    + .checkpoint = generic_file_checkpoint,
    +#endif
    };

    /***************************************************************
    --
    1.6.3.3


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