--- a/drivers/misc/pmem.c

+++ b/drivers/misc/pmem.c

@@ -1200,6 +1200,16 @@ static long pmem_ioctl(struct file *file

return pmem_connect(arg, file);

break;

+ case PMEM_CACHE_FLUSH:

+ {

+ struct pmem_region region;

+ if (copy_from_user(&region, (void __user *)arg,

+ sizeof(struct pmem_region)))

+ return -EFAULT;

+ flush_pmem_file(file, region.offset, region.len);

+ break;

+ }

+

case PMEM_CLEAN_INV_CACHES:

case PMEM_CLEAN_CACHES:

case PMEM_INV_CACHES:

--- a/include/linux/android_pmem.h

+++ b/include/linux/android_pmem.h

@@ -67,6 +67,7 @@

#define HW3D_REVOKE_GPU _IOW(PMEM_IOCTL_MAGIC, 8, unsigned int)

#define HW3D_GRANT_GPU _IOW(PMEM_IOCTL_MAGIC, 9, unsigned int)

+#define PMEM_CACHE_FLUSH _IOW(PMEM_IOCTL_MAGIC, 8, unsigned int)

#define PMEM_CLEAN_INV_CACHES _IOW(PMEM_IOCTL_MAGIC, 11, unsigned int)

#define PMEM_CLEAN_CACHES _IOW(PMEM_IOCTL_MAGIC, 12, unsigned int)

#define PMEM_INV_CACHES _IOW(PMEM_IOCTL_MAGIC, 13, unsigned int)