Commit 700487c1 authored Aug 04, 2009 by Paul Mundt

sh: Add a PG_dcache_dirty sanity check in kmap_coherent().



This plugs in a BUG_ON() in kmap_coherent() for PG_dcache_dirty pages
to catch when things go horribly wrong. Copied from the MIPS
implementation.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

parent 3ed6e129

arch/sh/mm/pg-mmu.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -37,6 +37,8 @@ static inline void kmap_coherent(struct page page, unsigned long addr)
		unsigned long vaddr, flags;
		pte_t pte;

		BUG_ON(test_bit(PG_dcache_dirty, &page->flags));

		inc_preempt_count();

		idx = (addr & current_cpu_data.dcache.alias_mask) >> PAGE_SHIFT;