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* tile: support CONFIG_PREEMPTChris Metcalf2013-08-131-1/+3
| | | | | | | | | | This change adds support for CONFIG_PREEMPT (full kernel preemption). In addition to the core support, this change includes a number of places where we fix up uses of smp_processor_id() and per-cpu variables. I also eliminate the PAGE_HOME_HERE and PAGE_HOME_UNKNOWN values for page homing, as it turns out they weren't being used. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
* take sys_fork/sys_vfork/sys_clone prototypes to linux/syscalls.hAl Viro2012-11-281-1/+0
| | | | | | now it can be done... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* arch/tile: eliminate pt_regs trampolines for syscallsChris Metcalf2012-10-231-5/+3
| | | | | | | | | | Using the new current_pt_regs() model, we can remove some trampolines from assembly code and call directly to the C syscall implementations. rt_sigreturn() and clone() still need some assembly wrapping, but no longer are passed a pt_regs pointer. sigaltstack() and the tilepro-specific cmpxchg_badaddr() syscalls are now just straight C. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
* tile: switch to generic sys_execve()Al Viro2012-10-231-1/+0
| | | | | Acked-by: Chris Metcalf <cmetcalf@tilera.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* arch/tile: support <asm/cachectl.h> header for cacheflush() syscallChris Metcalf2012-05-251-2/+8
| | | | | | | | | | We already had a syscall that did some dcache flushing, but it was not used in practice. Make it MIPS compatible instead so it can do both the DCACHE and ICACHE actions. We have code that wants to be able to use the ICACHE flush mode from userspace so this change enables that. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
* arch/tile: cleanups for tilegx compat modeChris Metcalf2011-05-191-9/+0
| | | | | | | | These changes make the syscall table line up correctly for tilegx compat mode, and remove the stale sys32_fadvise64() function, which isn't actually used by any syscall table. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
* BKL: remove extraneous #include <smp_lock.h>Arnd Bergmann2010-11-171-1/+0
| | | | | | | | | | The big kernel lock has been removed from all these files at some point, leaving only the #include. Remove this too as a cleanup. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* arch/tile: Use <asm-generic/syscalls.h>Chris Metcalf2010-10-141-0/+9
| | | | | | | | | | | | | | With this change we now include <asm-generic/syscalls.h> into the "tile" version of the header. To take full advantage of the prototypes there, we also change our naming convention for "struct pt_regs *" syscalls so that, e.g., _sys_execve() is the "true" syscall entry, which sets the appropriate register to point to the pt_regs before calling sys_execve(). While doing this I realized I no longer needed the fork and vfork entry point stubs, since those functions aren't in the generic syscall ABI, so I removed them as well. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
* arch/tile: Miscellaneous cleanup changes.Chris Metcalf2010-07-061-10/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This commit is primarily changes caused by reviewing "sparse" and "checkpatch" output on our sources, so is somewhat noisy, since things like "printk() -> pr_err()" (or whatever) throughout the codebase tend to get tedious to read. Rather than trying to tease apart precisely which things changed due to which type of code review, this commit includes various cleanups in the code: - sparse: Add declarations in headers for globals. - sparse: Fix __user annotations. - sparse: Using gfp_t consistently instead of int. - sparse: removing functions not actually used. - checkpatch: Clean up printk() warnings by using pr_info(), etc.; also avoid partial-line printks except in bootup code. - checkpatch: Use exposed structs rather than typedefs. - checkpatch: Change some C99 comments to C89 comments. In addition, a couple of minor other changes are rolled in to this commit: - Add support for a "raise" instruction to cause SIGFPE, etc., to be raised. - Remove some compat code that is unnecessary when we fully eliminate some of the deprecated syscalls from the generic syscall ABI. - Update the tile_defconfig to reflect current config contents. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
* Revert adding some arch-specific signal syscalls to <linux/syscalls.h>.Chris Metcalf2010-06-071-1/+1
| | | | | | | | | | | It turns out there is some variance on the calling conventions for these syscalls, and <asm-generic/syscalls.h> is already the mechanism used to handle this. Switch arch/tile over to using that mechanism and tweak the calling conventions for a couple of tile syscalls to match <asm-generic/syscalls.h>. Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
* arch/tile: core support for Tilera 32-bit chips.Chris Metcalf2010-06-041-0/+122
This change is the core kernel support for TILEPro and TILE64 chips. No driver support (except the console driver) is included yet. This includes the relevant Linux headers in asm/; the low-level low-level "Tile architecture" headers in arch/, which are shared with the hypervisor, etc., and are build-system agnostic; and the relevant hypervisor headers in hv/. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Reviewed-by: Paul Mundt <lethal@linux-sh.org>
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