kernel.git/arch/sh/mm, branch linux-2.6.28.y

sh: Don't factor in PAGE_OFFSET for valid_phys_addr_range() check.

2008-11-13T06:38:02Z

Signed-off-by: Paul Mundt

sh: Provide a sane valid_phys_addr_range() to prevent TLB reset with PMB.

2008-11-12T03:53:48Z

With the PMB enabled, only P1SEG and up are covered by the PMB mappings, meaning that situations where out-of-bounds physical addresses are read from will lead to TLB reset after the PMB miss, allowing for use cases like dd if=/dev/mem to reset the TLB. Fix this up to make sure the reference is between __MEMORY_START (phys) and __pa(high_memory). This is coherent across all variants of sh/sh64 with and without MMU, though the PMB bug itself is only applicable to SH-4A parts. Reported-by: Hideo Saito Signed-off-by: Paul Mundt

sh: Handle fixmap TLB eviction more coherently.

2008-11-10T11:00:45Z

There was a race in the kmap_coherent() implementation. While we guarded against preemption, there was nothing preventing eviction of the pre-faulted fixmap entry from the UTLB. Under certain workloads this would result in the fixmap entries used for cache colouring being evicted from the UTLB in the midst of a copy_page(). In addition to pre-faulting, we also make sure to preserve the PTEs in the kernel page table and introduce a cached PTE for kmap_coherent() usage. This follows a similar change on MIPS ("[MIPS] Fix aliasing bug in copy_to_user_page / copy_from_user_page"). Reported-by: Hideo Saito Reported-by: CHIKAMA Masaki Tested-by: Yoshihiro Shimoda Signed-off-by: Paul Mundt

sh: fix sh2a cache entry_mask

2008-10-31T07:29:20Z

fix sh2a cache entry_mask in __flush_{purge,invalidate}_region. Signed-off-by: Yoshihiro Shimoda Signed-off-by: Paul Mundt

sh: Kill off duplicate remove_memory() definition.

2008-10-21T03:51:51Z

Use the generic remove_memory() provided by mm/memory_hotplug.c instead. Signed-off-by: Andrew Morton Signed-off-by: Paul Mundt

sh: remove consistent alloc cruft

2008-10-20T02:38:44Z

Remove left overs from the generic declared coherent rework. Signed-off-by: Magnus Damm Signed-off-by: Paul Mundt

Fix debugfs_create_file's error checking method for arch/sh/mm/

2008-10-20T01:40:21Z

debugfs_create_file() returns NULL if an error occurs, returns -ENODEV when debugfs is not enabled in the kernel. Signed-off-by: Zhao Lei Signed-off-by: Paul Mundt

sh: Trivial trace_mark() instrumentation for core events.

2008-09-21T04:56:39Z

This implements a few trace points across events that are deemed interesting. This implements a number of trace points: - The page fault handler / TLB miss - IPC calls - Kernel thread creation The original LTTng patch had the slow-path instrumented, which fails to account for the vast majority of events. In general placing this in the fast-path is not a huge performance hit, as we don't take page faults for kernel addresses. The other bits of interest are some of the other trap handlers, as well as the syscall entry/exit (which is better off being handled through the tracehook API). Most of the other trap handlers are corner cases where alternate means of notification exist, so there is little value in placing extra trace points in these locations. Based on top of the points provided both by the LTTng instrumentation patch as well as the patch shipping in the ST-Linux tree, albeit in a stripped down form. Signed-off-by: Paul Mundt

sh: Kill off duplicate page fault notifiers in slow path.

2008-09-21T03:11:25Z

We already have hooks in place in the __do_page_fault() fast-path, so kill them off in the slow path. Signed-off-by: Paul Mundt

sh: Look up the trap vector for the page fault notifier.

2008-09-21T03:06:43Z

Signed-off-by: Paul Mundt