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add comment to explain kernel_read

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Sarang S. Dalal 2018-01-23 00:58:08 +01:00 • committed by GitHub
commit ba3ae093ed
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kernel/ashmem/ashmem.c
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@ -312,6 +312,8 @@ static ssize_t ashmem_read(struct file *file, char __user *buf,
* once asma->file is set it will never be changed, and will not * once asma->file is set it will never be changed, and will not
* be destroyed until all references to the file are dropped and * be destroyed until all references to the file are dropped and
* ashmem_release is called. * ashmem_release is called.
*
* kernel_read supersedes vfs_read from kernel version 3.9
*/ */
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0) #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0)
ret = __vfs_read(asma->file, buf, len, pos); ret = __vfs_read(asma->file, buf, len, pos);