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staging: ashmem: Fix ASHMEM_PURGE_ALL_CACHES return value

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Hopefully this isn't too late for 3.12.

In commit 7dc19d5aff (convert shrinkers to new count/scan API)
the return value to PURGE_ALL_CACHES was dropped, causing -EPERM
to always be returned.

This patch re-adds the ret assignment, setting it to the the
ashmem_shrink_count(), which is the lru_count.

(Sorry this was missed in the review!)

Fixes: 7dc19d5aff ("convert shrinkers to new count/scan API")
Cc: Colin Cross <ccross@android.com>
Cc: Android Kernel Team <kernel-team@android.com>
Cc: Glauber Costa <glommer@openvz.org>
Reported-by: YongQin Liu <yongqin.liu@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Cc: stable <stable@kernel.org> # 3.12
Acked-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
John Stultz 2013-10-21 09:58:07 -07:00 committed by Greg Kroah-Hartman
parent 29323b3e6b
commit 5957324045
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/android/ashmem.c
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@ -777,7 +777,7 @@ static long ashmem_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
.gfp_mask = GFP_KERNEL,
.nr_to_scan = LONG_MAX,
};
ret = ashmem_shrink_count(&ashmem_shrinker, &sc);
nodes_setall(sc.nodes_to_scan);
ashmem_shrink_scan(&ashmem_shrinker, &sc);
}