From 04c6b3e2b5e5c1dbd99ad7620033eafd05ff4c26 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Fri, 14 Feb 2014 14:08:48 +0400 Subject: xtensa: optimize local_flush_tlb_kernel_range Don't flush whole TLB if only a small kernel range is requested. Signed-off-by: Max Filippov --- arch/xtensa/kernel/smp.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'arch/xtensa/kernel') diff --git a/arch/xtensa/kernel/smp.c b/arch/xtensa/kernel/smp.c index aa8bd87..40b5a37 100644 --- a/arch/xtensa/kernel/smp.c +++ b/arch/xtensa/kernel/smp.c @@ -496,6 +496,21 @@ void flush_tlb_range(struct vm_area_struct *vma, on_each_cpu(ipi_flush_tlb_range, &fd, 1); } +static void ipi_flush_tlb_kernel_range(void *arg) +{ + struct flush_data *fd = arg; + local_flush_tlb_kernel_range(fd->addr1, fd->addr2); +} + +void flush_tlb_kernel_range(unsigned long start, unsigned long end) +{ + struct flush_data fd = { + .addr1 = start, + .addr2 = end, + }; + on_each_cpu(ipi_flush_tlb_kernel_range, &fd, 1); +} + /* Cache flush functions */ static void ipi_flush_cache_all(void *arg) -- cgit v1.1