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2013-03-02ext4: fix a warning from sparse check for ext4_dir_llseekZheng Liu1-1/+1
ext4_dir_llseek is only used as a callback function, and no one calls it directly. So make it as a static function in order to remove a warning message from sparse check. Signed-off-by: Zheng Liu <[email protected]> Signed-off-by: "Theodore Ts'o" <[email protected]>
2013-03-02ext4: convert number of blocks to clusters properlyLukas Czerner4-9/+9
We're using macro EXT4_B2C() to convert number of blocks to number of clusters for bigalloc file systems. However, we should be using EXT4_NUM_B2C(). Signed-off-by: Lukas Czerner <[email protected]> Signed-off-by: "Theodore Ts'o" <[email protected]> Cc: [email protected]
2013-03-02ext4: fix possible memory leak in ext4_remount()Wei Yongjun1-0/+1
'orig_data' is malloced in ext4_remount() and should be freed before leaving from the error handling cases, otherwise it will cause memory leak. Signed-off-by: Wei Yongjun <[email protected]> Signed-off-by: "Theodore Ts'o" <[email protected]> Reviewed-by: Lukas Czerner <[email protected]> Cc: [email protected]
2013-03-02jbd2: fix ERR_PTR dereference in jbd2__journal_startDmitry Monakhov1-1/+1
If start_this_handle() failed handle will be initialized to ERR_PTR() and can not be dereferenced. paging request at fffffffffffffff6 IP: [<ffffffff813c073f>] jbd2__journal_start+0x18f/0x290 PGD 200e067 PUD 200f067 PMD 0 Oops: 0000 [#1] SMP Modules linked in: cpufreq_ondemand acpi_cpufreq freq_table mperf coretemp kvm_intel kvm crc32c_intel ghash_clmulni_intel microcode sg xhci_hcd button sd_mod crc_t10dif aesni_intel ablk_helper cryptd lrw aes_x86_64 xts gf128mul ahci libahci pata_acpi ata_generic dm_mirror dm_region_hash dm_log dm_mod CPU 0 journal commit I/O error Pid: 2694, comm: fio Not tainted 3.8.0-rc3+ #79 /DQ67SW RIP: 0010:[<ffffffff813c073f>] [<ffffffff813c073f>] jbd2__journal_start+0x18f/0x290 RSP: 0018:ffff880233b8ba58 EFLAGS: 00010292 RAX: 00000000ffffffe2 RBX: ffffffffffffffe2 RCX: 0000000000000006 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff82128f48 RBP: ffff880233b8ba98 R08: 0000000000000000 R09: ffff88021440a6e0 Signed-off-by: Dmitry Monakhov <[email protected]> Signed-off-by: "Theodore Ts'o" <[email protected]>
2013-03-02metag: Provide dma_get_sgtable()James Hogan1-0/+7
metag/allmodconfig: drivers/media/v4l2-core/videobuf2-dma-contig.c: In function 'vb2_dc_get_base_sgt': drivers/media/v4l2-core/videobuf2-dma-contig.c:387: error: implicit declaration of function 'dma_get_sgtable' For architectures using dma_map_ops, dma_get_sgtable() is provided in <asm-generic/dma-mapping-common.h>. Metag does not use dma_map_ops yet, hence it should implement it as an inline stub using dma_common_get_sgtable(). Signed-off-by: James Hogan <[email protected]> Cc: Geert Uytterhoeven <[email protected]> Acked-by: Marek Szyprowski <[email protected]>
2013-03-02metag: prom.h: remove declaration of metag_dt_memblock_reserve()James Hogan1-1/+0
Metag doesn't have a metag_dt_memblock_reserve() function so remove the declaration from asm/prom.h. Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: copy devicetree to non-init memoryJames Hogan3-0/+20
Make a copy of the device tree blob in non-init memory. It is required when using built-in device tree files that the platform code copies the blob to non-init memory prior to calling unflatten_device_tree(), otherwise the strings that the device tree refer to will get poisoned and potentially reused, breaking later reading of the device tree post-init (such as compatible matching in modules, debugfs, and the procfs interface). Signed-off-by: James Hogan <[email protected]> Reviewed-by: Vineet Gupta <[email protected]>
2013-03-02metag: cleanup metag_ksyms.c includesJames Hogan1-6/+3
Minimise metag_ksyms.c includes to directly include the <asm/*.h> files that declare a particular symbol, and not include any unnecessary ones. Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: move mm/init.c exports out of metag_ksyms.cJames Hogan2-2/+3
It's less error prone to have function symbols exported immediately after the function rather than in metag_ksyms.c. Move each EXPORT_SYMBOL in metag_ksyms.c for symbols defined in mm/init.c into mm/init.c. Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: move usercopy.c exports out of metag_ksyms.cJames Hogan2-16/+13
It's less error prone to have function symbols exported immediately after the function rather than in metag_ksyms.c. Move each EXPORT_SYMBOL in metag_ksyms.c for symbols defined in usercopy.c into usercopy.c Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: move setup.c exports out of metag_ksyms.cJames Hogan2-5/+3
It's less error prone to have function symbols exported immediately after the function rather than in metag_ksyms.c. Move each EXPORT_SYMBOL in metag_ksyms.c for symbols defined in setup.c into setup.c Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: move kick.c exports out of metag_ksyms.cJames Hogan2-2/+3
It's less error prone to have function symbols exported immediately after the function rather than in metag_ksyms.c. Move each EXPORT_SYMBOL in metag_ksyms.c for symbols defined in kick.c into kick.c Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: move traps.c exports out of metag_ksyms.cJames Hogan2-5/+3
It's less error prone to have function symbols exported immediately after the function rather than in metag_ksyms.c. Move each EXPORT_SYMBOL in metag_ksyms.c for symbols defined in traps.c into traps.c Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: move irq enable out of irqflags.h on SMPJames Hogan2-7/+20
The SMP version of arch_local_irq_enable() uses preempt_disable(), but <asm/irqflags.h> doesn't include <linux/preempt.h> causing the following errors on SMP when pstore/ftrace is enabled (caught by buildbot smp allyesconfig): In file included from include/linux/irqflags.h:15, from fs/pstore/ftrace.c:16: arch/metag/include/asm/irqflags.h: In function 'arch_local_irq_enable': arch/metag/include/asm/irqflags.h:84: error: implicit declaration of function 'preempt_disable' arch/metag/include/asm/irqflags.h:86: error: implicit declaration of function 'preempt_enable_no_resched' However <linux/preempt.h> cannot be easily included from <asm/irqflags.h> as it can cause circular include dependencies in the !SMP case, and potentially in the SMP case in the future. Therefore move the SMP implementation of arch_local_irq_enable() into traps.c and use an inline version of get_trigger_mask() which is also defined in traps.c for SMP. This adds an extra layer of function call / stack push when preempt_disable needs to call other functions, however in the non-preemptive SMP case it should be about as fast, as it was already calling the get_trigger_mask() function which is now used inline. Signed-off-by: James Hogan <[email protected]>
2013-03-02genksyms: fix metag symbol prefix on crc symbolsJames Hogan1-1/+2
Meta uses symbol prefixes, so add "metag" to the list of architectures to set the mod_prefix to "_" for. This fixes __crc_* symbols to add the extra underscore to match _CRC_SYMBOL macro in <linux/export.h> and so that modpost finds them. Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: hugetlb: convert to vm_unmapped_area()James Hogan1-42/+10
Convert hugetlb_get_unmapped_area_new_pmd() to use vm_unmapped_area() rather than searching the virtual address space itself. This fixes the following errors in linux-next due to the specified members being removed after other architectures have already been converted: arch/metag/mm/hugetlbpage.c: In function 'hugetlb_get_unmapped_area_new_pmd': arch/metag/mm/hugetlbpage.c:199: error: 'struct mm_struct' has no member named 'cached_hole_size' arch/metag/mm/hugetlbpage.c:200: error: 'struct mm_struct' has no member named 'free_area_cache' arch/metag/mm/hugetlbpage.c:215: error: 'struct mm_struct' has no member named 'cached_hole_size' Signed-off-by: James Hogan <[email protected]> Acked-by: Michel Lespinasse <[email protected]>
2013-03-02metag: export clear_page and copy_pageJames Hogan1-0/+2
Various file systems use clear_page() and copy_page(), so when they're built as modules we get build errors like the following: ERROR: "clear_page" [fs/ntfs/ntfs.ko] undefined! ERROR: "copy_page" [fs/nilfs2/nilfs2.ko] undefined! Therefore export these functions to modules from metag_ksyms.c to fix the errors. This was hit by a randconfig build. Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: export metag_code_cache_flush_allJames Hogan1-0/+1
Various file systems indirectly use metag_code_cache_flush_all(), so when they're built as modules we get build errors like the following: ERROR: "metag_code_cache_flush_all" [fs/xfs/xfs.ko] undefined! Therefore export this function to modules to fix the errors. This was hit by a randconfig build. Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: protect more non-MMU memory regionsJames Hogan3-7/+42
Rename setup_txprivext() to setup_priv() and add initialisation of some more per-thread privilege protection registers: - TxPRIVSYSR: 0x04400000-0x047fffff 0x05000000-0x07ffffff 0x84000000-0x87ffffff - TxPIOREG: 0x02000000-0x02ffffff 0x04800000-0x048fffff - TxSYREG: 0x04000000-0x04000fff (except write fetch system event) Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: make TXPRIVEXT bits explicitJames Hogan2-7/+31
Define PRIV_BITS using explicit constants from <asm/metag_regs.h> rather than with a hard coded value. This also adds a couple of missing definitions for the TXPRIVEXT priv bits for protecting writes to TXTIMER and the trace registers. Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: kernel/setup.c: sort includesJames Hogan1-23/+23
Sort includes in kernel/setup.c. Signed-off-by: James Hogan <[email protected]>
2013-03-02perf: Enable building perf tools for MetaJames Hogan1-0/+6
Define rmb(), cpu_relax(), and CPUINFO_PROC for Meta so that the perf tools can be built for Meta. Signed-off-by: James Hogan <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]>
2013-03-02metag: add boot time LNKGET/LNKSET checkJames Hogan1-0/+79
Add boot time check for whether LNKGET/LNKSET go through or around the cache. Depending on the configuration an info message (no harm), warning (technically wrong but no harm), or big WARN (expect failure in either kernel or userland) may be emitted if the behaviour is not as expected: Configuration Hardware Response ------------------------------------------ -------- -------- AROUND_CACHE through pr_info !AROUND_CACHE && ATOMICITY_LNKGET around WARN (kernel) " && !ATOMICITY_LNKGET && SMP around WARN (user) " " && !SMP around pr_warn Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: add __init to metag_cache_probe()James Hogan1-1/+1
metag_cache_probe() is only called from setup_arch(), so add the __init attribute to it. Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: Add JTAG Debug Adapter (DA) supportJames Hogan9-0/+105
Add basic JTAG Debug Adapter (DA) support so that drivers which communicate with the DA can detect whether one is actually present (otherwise the target will halt indefinitely). This allows the metag_da TTY driver and imgdafs filesystem driver to be built, updates defconfigs, and sets up the metag_da console early if it's configured in. Signed-off-by: James Hogan <[email protected]>
2013-03-02scripts/checkstack.pl: Add metag supportJames Hogan1-2/+6
Adapt checkstack.pl so that it works for metag. Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: ftrace supportJames Hogan7-1/+248
Add ftrace support for metag. Signed-off-by: James Hogan <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Ingo Molnar <[email protected]> Reviewed-by: Steven Rostedt <[email protected]>
2013-03-02metag: PerfJames Hogan7-0/+1073
Add Perf support for metag. Signed-off-by: James Hogan <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]>
2013-03-02metag: Build infrastructureJames Hogan19-0/+1124
Add metag build infrastructure. Signed-off-by: James Hogan <[email protected]>
2013-03-02Kconfig.debug: add METAG to dependency listsJames Hogan1-2/+2
Add [!]METAG to a couple of Kconfig dependencies in lib/Kconfig.debug. Don't allow stack utilization instrumentation on metag, and allow building with frame pointers. Signed-off-by: James Hogan <[email protected]> Cc: Andrew Morton <[email protected]> Cc: "Paul E. McKenney" <[email protected]> Cc: Akinobu Mita <[email protected]> Cc: Michel Lespinasse <[email protected]> Cc: Catalin Marinas <[email protected]>
2013-03-02mm: define VM_GROWSUP for CONFIG_METAGJames Hogan1-0/+2
Commit cc2383ec06be093789469852e1fe96e1148e9a2c ("mm: introduce arch-specific vma flag VM_ARCH_1") merged in v3.7-rc1. The above commit combined several arch-specific vma flags into one, and in the process it changed the VM_GROWSUP definition to depend on specific architectures rather than CONFIG_STACK_GROWSUP. Therefore add an ifdef for CONFIG_METAG to also set VM_GROWSUP. Signed-off-by: James Hogan <[email protected]> Cc: Konstantin Khlebnikov <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Michel Lespinasse <[email protected]> Cc: Al Viro <[email protected]> Cc: [email protected]
2013-03-02metag: Various other headersJames Hogan11-0/+526
Add the remaining metag header files: - byteorder.h, swab.h (byte order and swapping) - barrier.h, cpu.h. hwthread.h, processor.h (hardware thread related) - bug.h, elf.h, gpio.h, linkage.h, resource.h (other) Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: Stack unwindingJames Hogan2-0/+207
Add stack unwinding support for metag. Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: Optimised library functionsJames Hogan20-0/+1474
Add optimised library functions for metag. Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: DMAJames Hogan2-0/+690
Add DMA mapping code. Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: SMP supportJames Hogan9-0/+1064
Add SMP support for metag. This allows Linux to take control of multiple hardware threads on a single Meta core, treating them as separate Linux CPUs. Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: Basic documentationJames Hogan4-0/+266
Add basic metag documentation. This includes an outline description of the ABIs (including syscall ABI) and calling conventions, similar to the one in Documentation/frv/. Signed-off-by: James Hogan <[email protected]> Cc: Rob Landley <[email protected]> Cc: Al Viro <[email protected]> Cc: [email protected]
2013-03-02metag: Atomics, locks and bitopsJames Hogan13-0/+1395
Add header files to implement Meta hardware thread locks (used by some other atomic operations), atomics, spinlocks, and bitops. There are 2 main types of atomic primitives for metag (in addition to IRQs off on UP): - LOCK instructions provide locking between hardware threads. - LNKGET/LNKSET instructions provide load-linked/store-conditional operations allowing for lighter weight atomics on Meta2 LOCK instructions allow for hardware threads to acquire voluntary or exclusive hardware thread locks: - LOCK0 releases exclusive and voluntary lock from the running hardware thread. - LOCK1 acquires the voluntary hardware lock, blocking until it becomes available. - LOCK2 implies LOCK1, and additionally acquires the exclusive hardware lock, blocking all other hardware threads from executing. Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: Module supportJames Hogan2-0/+321
Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: Scheduling/Process managementJames Hogan2-0/+616
Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: System CallsJames Hogan8-0/+508
Add metag system call and gateway page interfaces. The metag architecture port uses the generic system call numbers from asm-generic/unistd.h, as well as a user gateway page mapped at 0x6ffff000 which contains fast atomic primitives (depending on SMP) and a fast method of accessing TLS data. System calls use the SWITCH instruction with the immediate 0x440001 to signal a system call. Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: Internal and external irqchipsJames Hogan8-0/+1359
Meta core internal interrupts (from HWSTATMETA and friends) are vectored onto the TR1 core trigger for the current thread. This is demultiplexed in irq-metag.c to individual Linux IRQs for each internal interrupt. External SoC interrupts (from HWSTATEXT and friends) are vectored onto the TR2 core trigger for the current thread. This is demultiplexed in irq-metag-ext.c to individual Linux IRQs for each external SoC interrupt. The external irqchip has devicetree bindings for configuring the number of irq banks and the type of masking available. Signed-off-by: James Hogan <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Grant Likely <[email protected]> Cc: Rob Herring <[email protected]> Cc: Rob Landley <[email protected]> Cc: Dom Cobley <[email protected]> Cc: Simon Arlott <[email protected]> Cc: Viresh Kumar <[email protected]> Cc: Maxime Ripard <[email protected]> Cc: [email protected] Cc: [email protected]
2013-03-02metag: IRQ handlingJames Hogan3-0/+444
Add core IRQ handling for metag. The code in irq.c exposes the TBX signal numbers as Linux IRQs. Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: TrapsJames Hogan5-0/+1167
Add trap code for metag. At the lowest level Meta traps (and return from interrupt instruction - RTI) simply swap the PC and PCX registers and optionally toggle the interrupt status bit (ISTAT). Low level TBX code in tbipcx.S handles the core context save, determine the TBX signal number based on the core trigger that fired (using the TXSTATI status register), and call TBX signal handlers (mostly in traps.c) via a vector table. Signed-off-by: James Hogan <[email protected]> Cc: Al Viro <[email protected]>
2013-03-02metag: Time keepingJames Hogan10-0/+378
Add time keeping code for metag. Meta hardware threads have 2 timers. The background timer (TXTIMER) is used as a free-running time base, and the interrupt timer (TXTIMERI) is used for the timer interrupt. Both counters traditionally count at approximately 1MHz. Signed-off-by: James Hogan <[email protected]> Cc: John Stultz <[email protected]> Cc: Thomas Gleixner <[email protected]>
2013-03-02metag: ptraceJames Hogan4-0/+555
The ptrace interface for metag provides access to some core register sets using the PTRACE_GETREGSET and PTRACE_SETREGSET operations. The details of the internal context structures is abstracted into user API structures to both ease use and allow flexibility to change the internal context layouts. Copyin and copyout functions for these register sets are exposed to allow signal handling code to use them to copy to and from the signal context. struct user_gp_regs (NT_PRSTATUS) provides access to the core general purpose register context. struct user_cb_regs (NT_METAG_CBUF) provides access to the TXCATCH* registers which contains information abuot a memory fault, unaligned access error or watchpoint. This can be modified to alter the way the fault is replayed on resume ("catch replay"), or to prevent the replay taking place. struct user_rp_state (NT_METAG_RPIPE) provides access to the state of the Meta read pipeline which can be used to hide memory latencies in hand optimised data loops. Extended DSP register state, DSP RAM, and hardware breakpoint registers aren't yet exposed through ptrace. Signed-off-by: James Hogan <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Tony Lindgren <[email protected]> Cc: "Paul E. McKenney" <[email protected]>
2013-03-02metag: Device treeJames Hogan5-0/+160
Add device tree files to arch/metag. Signed-off-by: James Hogan <[email protected]> Reviewed-by: Vineet Gupta <[email protected]>
2013-03-02metag: Signal handlingJames Hogan3-0/+383
Add signal handling code for metag. Signed-off-by: James Hogan <[email protected]> Cc: Al Viro <[email protected]>
2013-03-02metag: TCM supportJames Hogan5-0/+317
Add some TCM support Signed-off-by: James Hogan <[email protected]>
2013-03-02metag: Highmem supportJames Hogan3-0/+294
Signed-off-by: James Hogan <[email protected]>
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