powerpc/32s: automatically allocate BAT in setbat() (cbcaff7d) · Commits · 戴 / test

If no BAT is given to setbat(), select an available BAT. Signed-off-by:

arch/powerpc/mm/book3s32/mmu.c

+10 −1

Original line number	Diff line number	Diff line
		@@ -251,9 +251,18 @@ void __init setbat(int index, unsigned long virt, phys_addr_t phys,
		{
		unsigned int bl;
		int wimgxpp;
		struct ppc_bat *bat = BATS[index];
		struct ppc_bat *bat;
		unsigned long flags = pgprot_val(prot);

		if (index == -1)
		index = find_free_bat();
		if (index == -1) {
		pr_err("%s: no BAT available for mapping 0x%llx\n", __func__,
		(unsigned long long)phys);
		return;
		}
		bat = BATS[index];

		if ((flags & _PAGE_NO_CACHE) \|\|
		(cpu_has_feature(CPU_FTR_NEED_COHERENT) == 0))
		flags &= ~_PAGE_COHERENT;