On Mon, Mar 01, 2021 at 08:56:07PM +0100, Ben Hutchings wrote: > The arm64 implementations of some atomic operations had incorrect > assembly constraints. Depending on the compiler version and > options, this can result in a build failure for some parameter > values: > > /tmp/ccDOb5nB.s: Assembler messages: > /tmp/ccDOb5nB.s:2214: Error: immediate out of range at operand 3 -- `bic w1,w0,5' > > This has specifically been seen when building a 4.9 stable kernel with > gcc 6.3.0, since commit 23025393dbeb "xen/netback: use lateeoi irq > binding" was applied. I can also reproduce it with 4.14. > > I cannot reproduce it with 4.19, but the same fixes are applicable and > the issue presumably could occur when using different compiler > options. > > I haven't done anything about the 4.4 branch since it does not have > that xen-netback fix and it has significantly different definitions > for arm64 atomic ops. > > I've attached a mailbox of patches for each of the 4.9, 4.14, and 4.19 > branches. All now queued up, thanks. greg k-h
