linux/arch/tile, branch v3.2.41

arch/tile: avoid generating .eh_frame information in modules

2012-10-30T23:26:55Z

commit 627072b06c362bbe7dc256f618aaa63351f0cfe6 upstream. The tile tool chain uses the .eh_frame information for backtracing. The vmlinux build drops any .eh_frame sections at link time, but when present in kernel modules, it causes a module load failure due to the presence of unsupported pc-relative relocations. When compiling to use compiler feedback support, the compiler by default omits .eh_frame information, so we don't see this problem. But when not using feedback, we need to explicitly suppress the .eh_frame. Signed-off-by: Chris Metcalf Signed-off-by: Ben Hutchings

tile: fix bug where fls(0) was not returning 0

2012-05-30T23:44:03Z

commit 9f1d62bed7f015d11b9164078b7fea433b474114 upstream. This is because __builtin_clz(0) returns 64 for the "undefined" case of 0, since the builtin just does a right-shift 32 and "clz" instruction. So, use the alpha approach of casting to u32 and using __builtin_clzll(). Signed-off-by: Chris Metcalf Signed-off-by: Ben Hutchings

tilegx: enable SYSCALL_WRAPPERS support

2012-05-30T23:43:19Z

commit e6d9668e119af44ae5bcd5f1197174531458afe3 upstream. Some discussion with the glibc mailing lists revealed that this was necessary for 64-bit platforms with MIPS-like sign-extension rules for 32-bit values. The original symptom was that passing (uid_t)-1 to setreuid() was failing in programs linked -pthread because of the "setxid" mechanism for passing setxid-type function arguments to the syscall code. SYSCALL_WRAPPERS handles ensuring that all syscall arguments end up with proper sign-extension and is thus the appropriate fix for this problem. On other platforms (s390, powerpc, sparc64, and mips) this was fixed in 2.6.28.6. The general issue is tracked as CVE-2009-0029. Signed-off-by: Chris Metcalf Signed-off-by: Ben Hutchings

arch/tile/Kconfig: remove pointless "!M386" test.

2012-05-30T23:43:18Z

commit 8d6951439ef524683057251f1231df232046b6b6 upstream. Looks like a cut and paste bug from the x86 version. Signed-off-by: Chris Metcalf Signed-off-by: Ben Hutchings

arch/tile: apply commit 74fca9da0 to the compat signal handling as well

2012-05-20T21:56:50Z

commit a134d228298c6aa9007205c6b81cae0cac0acb5d upstream. This passes siginfo and mcontext to tilegx32 signal handlers that don't have SA_SIGINFO set just as we have been doing for tilegx64. Signed-off-by: Chris Metcalf Signed-off-by: Ben Hutchings

arch/tile: use new generic {enable,disable}_percpu_irq() routines

2011-12-03T20:31:49Z

We provided very similar routines internally, but now we can hook into the generic framework by supplying our routines as function pointers in the irq_chip structure instead. Signed-off-by: Chris Metcalf

arch/tile: fix double-free bug in homecache_free_pages()

2011-12-03T20:31:47Z

When freeing the page with this API, the page was "put" twice. This was only discovered bringing up an MPT fusion controller, which actually used the API; it hadn't been invoked previously, so the bug had gone unnoticed. Signed-off-by: Chris Metcalf

arch/tile: add a few #includes and an EXPORT to catch up with kernel changes.

2011-12-03T20:31:41Z

The empty_zero_page[] export is required for ZERO_PAGE() module references. The #includes are due to changes in implicit inclusion, and should of course have been in the sources from the beginning. Signed-off-by: Chris Metcalf

Merge branch 'for-linus' of git://github.com/cmetcalf-tilera/linux-tile

2011-11-04T19:33:34Z

* 'for-linus' of git://github.com/cmetcalf-tilera/linux-tile: arch/tile: factor out header arch/tile: add the headers to the set of installed kernel headers arch/tile: avoid exporting a symbol no longer used by gcc arch/tile: avoid ISO namespace pollution with

arch/tile: factor out header

2011-11-03T20:58:54Z

The kernel code was using some headers that included a mix of hardware-specific information (typically found in Tilera headers) and structures, enums, and function declarations supporting the disassembly function of the tile-desc.c sources. This change refactors that code so that a hardware-specific, but OS- and application-agnostic header, is created: . This header is then exported to userspace along with the other headers and can be used to build userspace code; in particular, it is used by glibc as part of implementing the backtrace() function. The new header, together with a header that specifically describes the disassembly code ( with _32 and _64 variants), replaces the old and headers. As part of this change, we are also renaming the 32-bit constants from TILE_xxx to TILEPRO_xxx to better reflect the fact that they are specific to the TILEPro architecture, and not to TILE-Gx and any successor "tile" architecture chips. Signed-off-by: Chris Metcalf