[Bug 92845] [BSW clflush] igt/gem_partial_pwrite_pread subtests fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92845

--- Comment #7 from Chris Wilson <chris at chris-wilson.co.uk> ---
I've trimmed it down to

diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 6000ad7..54683f9 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -141,6 +141,8 @@ void clflush_cache_range(void *vaddr, unsigned int size)
        for (; p < vend; p += clflush_size)
                clflushopt(p);

+       clflushopt(vaddr);
+
        mb();
 }
 EXPORT_SYMBOL_GPL(clflush_cache_range);

(with the proviso of converting us over to clflush_cache_range).

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