[POWERPC] 8xx: platform specific mmu updates (dbbb06b7) · Commits · 戴 / test

This is just a straight port of the same done in arch/ppc by Marcelo Tosatti. One used to be [PATCH] ppc32 8xx: update_mmu_cache() needs unconditional tlbie, commit In a nutshell, the board is nearly stuck without this, yet without any visible failure - being just very slow. Signed-off-by:

Vitaly Bordug <vbordug@ru.mvista.com> Signed-off-by:

Paul Mackerras <paulus@samba.org>

arch/powerpc/mm/mem.c

+10 −10

Original line number	Diff line number	Diff line
		@@ -490,9 +490,6 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
		!cpu_has_feature(CPU_FTR_NOEXECUTE) &&
		pfn_valid(pfn)) {
		struct page *page = pfn_to_page(pfn);
		if (!PageReserved(page)
		&& !test_bit(PG_arch_1, &page->flags)) {
		if (vma->vm_mm == current->active_mm) {
		#ifdef CONFIG_8xx
		/* On 8xx, cache control instructions (particularly
		* "dcbst" from flush_dcache_icache) fault as write
		@@ -503,6 +500,9 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
		*/
		_tlbie(address);
		#endif
		if (!PageReserved(page)
		&& !test_bit(PG_arch_1, &page->flags)) {
		if (vma->vm_mm == current->active_mm) {
		__flush_dcache_icache((void *) address);
		} else
		flush_dcache_icache_page(page);

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