On Mon, 4 May 2020 18:05:18 +0100, Daniel Thompson wrote:

flush_icache_range() contains a bodge to avoid issuing IPIs when the kgdb
trap handler is running because issuing IPIs is unsafe (and not needed)
in this execution context. However the current test, based on
kgdb_connected is flawed: it both over-matches and under-matches.

The over match occurs because kgdb_connected is set when gdb attaches
to the stub and remains set during normal running. This is relatively
harmelss because in almost all cases irq_disabled() will be false.

[...]

Applied to arm64 (for-next/misc), thanks!

[1/1] arm64: cacheflush: Fix KGDB trap detection
      https://git.kernel.org/arm64/c/ab8ad279ceac

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev

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