RE: [PATCH v2 0/2] kdump: simplify code
From: David Laight <hidden>
Date: 2021-12-11 17:53:54
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From: Tiezhu Yang
Sent: 11 December 2021 03:33 v2: -- add copy_to_user_or_kernel() in lib/usercopy.c -- define userbuf as bool type
Instead of having a flag to indicate whether the buffer is user or kernel, would it be better to have two separate buffer pointers. One for a user space buffer, the other for a kernel space buffer. Exactly one of the buffers should always be NULL. That way the flag is never incorrectly set. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales) _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel