On Tue, 21 Jul 2020 15:04:49 +0200 Christoph Hellwig <[email protected]> wrote:
> Add a helper that waits for a pid and stores the status in the passed > in kernel pointer. Use it to fix the usage of kernel_wait4 in > call_usermodehelper_exec_sync that only happens to work due to the > implicit set_fs(KERNEL_DS) for kernel threads. I guess it's cleaner, although it's a bit sad to be adding code to address a non-problem. Did you consider a simpler kernel_wait() which just wraps a set_fs(KERNEL_DS) around a call to kernel_wait4()?
