kernel.git/arch/sh/mm, branch linux-3.7.y

readahead: fault retry breaks mmap file read random detection

2012-10-09T07:22:47Z

.fault now can retry. The retry can break state machine of .fault. In filemap_fault, if page is miss, ra->mmap_miss is increased. In the second try, since the page is in page cache now, ra->mmap_miss is decreased. And these are done in one fault, so we can't detect random mmap file access. Add a new flag to indicate .fault is tried once. In the second try, skip ra->mmap_miss decreasing. The filemap_fault state machine is ok with it. I only tested x86, didn't test other archs, but looks the change for other archs is obvious, but who knows :) Signed-off-by: Shaohua Li Cc: Rik van Riel Cc: Wu Fengguang Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

sh: Fix up recursive fault in oops with unset TTB.

2012-07-25T04:11:13Z

Presently the oops code looks for the pgd either from the mm context or the cached TTB value. There are presently cases where the TTB can be unset or otherwise cleared by hardware, which we weren't handling, resulting in recursive faults on the NULL pgd. In these cases we can simply reload from swapper_pg_dir and continue on as normal. Cc: stable@vger.kernel.org Signed-off-by: Paul Mundt

sh64: Fix up section mismatch warnings.

2012-06-14T06:05:53Z

WARNING: vmlinux.o(.cpuinit.text+0x280): Section mismatch in reference from the function cpu_probe() to the function .init.text:sh64_tlb_init() The function __cpuinit cpu_probe() references a function __init sh64_tlb_init(). If sh64_tlb_init is only used by cpu_probe then annotate sh64_tlb_init with a matching annotation. sh64_tlb_init() simply needs to be __cpuinit annotated, so fix that up. Signed-off-by: Paul Mundt

sh64: Fix up vmalloc fault range check.

2012-05-18T11:01:16Z

With the previous attempt reverted this switches to conditionalizing the end address. Nominally VMALLOC_END, but extended for P3_ADDR_MAX in the store queue case. Signed-off-by: Paul Mundt

Revert "sh: Ensure fixmap and store queue space can co-exist."

2012-05-18T10:30:05Z

This reverts commit 20e7c297efeca0861adcca073a0d283da659834b. With store queues enabled the area above P4SEG has special properties from the MMU's point of view, which was causing fixmap failure. We'll have to do something else to satisfy the vmalloc range check. Signed-off-by: Paul Mundt

sh64: Set additional fault code values.

2012-05-14T08:46:49Z

The SSR.MD status amongst other things are already made available, which can be used for encoding a more precise fault code value. Signed-off-by: Paul Mundt

sh64: Tidy up and consolidate the TLB miss fast path.

2012-05-14T08:24:21Z

This unifies the fast-path TLB miss handler, allowing for further cleanup and eventual utilization of a shared _32/_64 handler. Signed-off-by: Paul Mundt

sh64: Fix up caller-save register settings for fast-path.

2012-05-14T07:46:07Z

Now that the fast-path handler has been moved, we also need to update the Makefile to ensure that the same restrictions for caller-save registers are observed. Signed-off-by: Paul Mundt

sh64: Invert page fault fast-path error path values.

2012-05-14T07:44:45Z

This brings the sh64 version in line with the sh32 one with regards to how errors are handled. Base work for further unification of the implementations. Signed-off-by: Paul Mundt

sh64: Migrate to __update_tlb() API.

2012-05-14T06:52:28Z

Now that we have a method for finding out if we're handling an ITLB fault or not without passing it all the way down the chain, it's possible to use the __update_tlb() interface in place of a special __do_tlb_refill(). Signed-off-by: Paul Mundt