linux/arch/sh/kernel/vmlinux.lds.S, branch v3.0.82

percpu: Always align percpu output section to PAGE_SIZE

2011-03-24T17:50:09Z

Percpu allocator honors alignment request upto PAGE_SIZE and both the percpu addresses in the percpu address space and the translated kernel addresses should be aligned accordingly. The calculation of the former depends on the alignment of percpu output section in the kernel image. The linker script macros PERCPU_VADDR() and PERCPU() are used to define this output section and the latter takes @align parameter. Several architectures are using @align smaller than PAGE_SIZE breaking percpu memory alignment. This patch removes @align parameter from PERCPU(), renames it to PERCPU_SECTION() and makes it always align to PAGE_SIZE. While at it, add PCPU_SETUP_BUG_ON() checks such that alignment problems are reliably detected and remove percpu alignment comment recently added in workqueue.c as the condition would trigger BUG way before reaching there. For um, this patch raises the alignment of percpu area. As the area is in .init, there shouldn't be any noticeable difference. This problem was discovered by David Howells while debugging boot failure on mn10300. Signed-off-by: Tejun Heo Acked-by: Mike Frysinger Cc: uclinux-dist-devel@blackfin.uclinux.org Cc: David Howells Cc: Jeff Dike Cc: user-mode-linux-devel@lists.sourceforge.net

percpu: align percpu readmostly subsection to cacheline

2011-01-25T13:26:50Z

Currently percpu readmostly subsection may share cachelines with other percpu subsections which may result in unnecessary cacheline bounce and performance degradation. This patch adds @cacheline parameter to PERCPU() and PERCPU_VADDR() linker macros, makes each arch linker scripts specify its cacheline size and use it to align percpu subsections. This is based on Shaohua's x86 only patch. Signed-off-by: Tejun Heo Cc: Shaohua Li

sh: Kill off some superfluous legacy PMB special casing.

2010-02-16T12:43:38Z

The __va()/__pa() offsets and the boot memory offsets are consistent for all PMB users, so there is no need to special case these for legacy PMB. Kill the special casing off and depend on CONFIG_PMB across the board. This also fixes up yet another addressing bug for sh64. Signed-off-by: Paul Mundt

sh: Fix up legacy PMB mode offset calculation.

2010-02-15T07:10:57Z

The change for fixing up sh64 inadvertently inverted the logic for legacy PMB, fix that back up. Signed-off-by: Paul Mundt

sh64: fix up memory offset calculation.

2010-02-12T06:41:45Z

The linker script offsets were broken by the recent 29/32-bit integration, so this fixes it up for sh64. Signed-off-by: Paul Mundt

sh: kmemleak support.

2010-01-27T13:03:11Z

Enables support for kmemleak on sh. Signed-off-by: Chris Smith Signed-off-by: Paul Mundt

sh: Kill off the special uncached section and fixmap.

2010-01-21T07:05:25Z

Now that cached_to_uncached works as advertized in 32-bit mode and we're never going to be able to map < 16MB anyways, there's no need for the special uncached section. Kill it off. Signed-off-by: Paul Mundt

sh: fixed PMB mode refactoring.

2010-01-13T09:31:48Z

This introduces some much overdue chainsawing of the fixed PMB support. fixed PMB was introduced initially to work around the fact that dynamic PMB mode was relatively broken, though they were never intended to converge. The main areas where there are differences are whether the system is booted in 29-bit mode or 32-bit mode, and whether legacy mappings are to be preserved. Any system booting in true 32-bit mode will not care about legacy mappings, so these are roughly decoupled. Regardless of the entry point, PMB and 32BIT are directly related as far as the kernel is concerned, so we also switch back to having one select the other. With legacy mappings iterated through and applied in the initialization path it's now possible to finally merge the two implementations and permit dynamic remapping overtop of remaining entries regardless of whether boot mappings are crafted by hand or inherited from the boot loader. Signed-off-by: Paul Mundt

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

2009-09-16T04:48:32Z

Conflicts: arch/sh/kernel/vmlinux.lds.S

sh: dwarf unwinder support.

2009-08-13T16:58:43Z

This is a first cut at a generic DWARF unwinder for the kernel. It's still lacking DWARF64 support and the DWARF expression support hasn't been tested very well but it is generating proper stacktraces on SH for WARN_ON() and NULL dereferences. Signed-off-by: Matt Fleming Signed-off-by: Paul Mundt