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    Subject[PATCH 2/5] tmpfs: mpol=bind:0 don't cause mount error.
    Date
    Currently, following mount operation cause mount error.

    % mount -t tmpfs -ompol=bind:0 none /tmp

    Because commit 71fe804b6d5 (mempolicy: use struct mempolicy pointer in
    shmem_sb_info) corrupted MPOL_BIND parse code.

    This patch restore the needed one.

    Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
    Cc: Ravikiran Thirumalai <kiran@scalex86.org>
    Cc: Christoph Lameter <cl@linux-foundation.org>
    Cc: Mel Gorman <mel@csn.ul.ie>
    Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
    Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
    Cc: <stable@kernel.org>
    ---
    mm/mempolicy.c | 10 +++++++---
    1 files changed, 7 insertions(+), 3 deletions(-)

    diff --git a/mm/mempolicy.c b/mm/mempolicy.c
    index 25a0c0f..3f77062 100644
    --- a/mm/mempolicy.c
    +++ b/mm/mempolicy.c
    @@ -2220,9 +2220,13 @@ int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context)
    if (!nodelist)
    err = 0;
    goto out;
    - /*
    - * case MPOL_BIND: mpol_new() enforces non-empty nodemask.
    - */
    + case MPOL_BIND:
    + /*
    + * Insist on a nodelist
    + */
    + if (!nodelist)
    + goto out;
    + err = 0;
    }

    mode_flags = 0;
    --
    1.6.5.2




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