- 04 8月, 2010 27 次提交
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由 Michal Simek 提交于
Keep together all arguments for send_sig function. Move returning address to delay slot which is executed. Remove additional send_sig loading. I am using IMM part of rtbd instruction with r0. old solution: addik r11, r0, send_sig rtbd r11, 0 nop new solution: rtbd r0, send_sig nop There is one instruction saving. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
It is necessary to setup BIP and EE and clear EIP only for unaligned exception handler. The rest of hw exception handlers don't require it. HW exception occured and we are not in virtual mode. That's why we can do operations protected by EIP. Interrupt, next hw exception or syscall can't occur. EIP is cleared by rted. This change speedup page_fault hw exception handler which is critical path. There is also necessary to save R11 content before flag setup for unaligned exception. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
la is translated to addik by toolchain. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
SAVE_STATE macro is used in hw exceptions high level handling functions. Hw exception doesn't disable IRQ that's why we don't need to reenable it. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
Remove code duplicity and move it to SAVE_STATE macro. There is no impact on performance. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
We don't need to protect by BIP whole ret_from_trap/ret_from_exc code. Only restoring from user/hw exception should be covered. If BIP is setup, IRQ can't occur. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
There is a way howto remove Kernel Mode variable. It is easier to parse UMS bit in MSR to find out if I come from kernel or user space. Loading MSR content should be in one cycle and loading PER_CPU variable depends on memory state. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
We can save two instruction when MSR_VMS and MSR_UMS are setup in one instruction. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
Save and restore R3/R4 registers in macros. This change help to cleanup entry.S. In ret_from_trap function we are saving returning value from syscall to pt_regs on stack that's why we don't need to save and restore these values before kernel functions (schedule, do_signal). Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
Jump behind macro. We don't want to execute nop instruction again. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
_start symbol stores physical address where kernel is. Gdb uses this symbol for their purpose that's why we have to rename it. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
Remove spaces and use tabs instead. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
Microblaze has only 11 pvr regs according manual. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
Lower shifting values ensure that shifted 32bit counter value doesn't exceed 64bit cycle variable too fast. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
Microblaze has support for early printk. The second serial driver (uart16550/8250) has no microblaze support for early printk. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 FUJITA Tomonori 提交于
HAVE_ARCH_PCI_SET_DMA_MASK was removed in 2.6.34 (no architecture has the own implementation of pci_set_dma_mask). Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
IRQsoff tracer requires to protect cpu_idle function to get correct timing report. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
I had to comment sched_clock generic function because of broken toolchain. It is fine grain timing. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Steven J. Magnani 提交于
Implement intelligent backtracing by searching for stack frame creation, and emitting only return addresses. Use print_hex_dump() to display the entire binary kernel stack. Limitation: MMU kernels are not currently able to trace beyond a system trap (interrupt, syscall, etc.). It is the intent of this patch to provide infrastructure that can be extended to add this capability later. Changes from V1: * Removed checks in find_frame_creation() that prevented location of the frame creation instruction in heavily optimized code * Various formatting/commenting/file location tweaks per review comments * Dropped Kconfig option to enable STACKTRACE as something logically separate Signed-off-by: NSteven J. Magnani <steve@digidescorp.com>
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由 Steven J. Magnani 提交于
Allow developer to configure memory page size at compile time. Larger pages can improve performance on some workloads. Based on PowerPC code. Signed-off-by: NSteven J. Magnani <steve@digidescorp.com> Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
Add trace_hardirqs_off and trace_hardirqs_on to do_IRQ function. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
sys_clone syscall ignored args which this patch mapped to args which are passing from glibc. Here is the origin problem description. "I ran the static libgcc tests (very few of them are there, they are mostly dynamically linked) and some of them fail with an assertion in fork() system call (tid != pid), I looked at the microblaze/entry.S file and it looks suspicious (ignores arguments 3-5)" Arg mapping should be: glibc ARCH_FORK(...) -> do_fork(...) r5 -> r5 (clone_flags) r6 -> r6 (stack_start, use parent->stack if NULL) pt_regs -> r7 (pt_regs) r7 -> r8 (stack_size) r8 -> r9 (parent_tidptr) r9 -> r10 (child_tidptr) Signed-off-by: NJohn Williams <john.williams@petalogix.com> Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
Microblaze doesn't support frame pointers. Ftrace code uses CALLER_ADDR1 which is defined in linux/ftrace.h. For Microblaze is 0. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
copy_to_user_page macro is used in mm/memory.c:access_process_vm function. This function is called from ptrace code (POKETEXT, POKEDATA) which write data to memory. Microblaze handle physical address for caches that's why there is virt_to_phys conversion. There is potential one location which can caused the problem on WB system. The important is take a look at write PTRACEs requests (POKE/TEXT, DATA, USR). Note: Majority of Microblaze PTRACE code is moved to generic location in newer kernel version that's why this solution should work on the newest kernel version too. linux/io.h is in cacheflush because of mm/nommu.c Tested on a WB system - hello world debugging. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
Both versions can use the same node to register NODE_DATA(0) Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
The label should be remove by 21e1c936 Warning message: arch/microblaze/mm/fault.c: In function 'do_page_fault': arch/microblaze/mm/fault.c:229: warning: label 'survive' defined but not used Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
flush_dcache_page macro is necessary to implement for JFFS2 rootfs support on WB system. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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- 02 8月, 2010 4 次提交
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由 Michal Simek 提交于
There is wrong comment for TLB. Early printk uartlite console uses TLB 63. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Michal Simek 提交于
__copy_to/from_user_inatomic should call __copy_to/from_user because there is not necessary to check access because of kernel function. might_sleep in copy_to/from_user macros is causing problems in debug sessions too (CONFIG_DEBUG_SPINLOCK_SLEEP). BUG: sleeping function called from invalid context at .../arch/microblaze/include/asm/uaccess.h:388 in_atomic(): 1, irqs_disabled(): 0, pid: 1, name: swapper 1 lock held by swapper/1: #0: (&p->cred_guard_mutex){......}, at: [<c00d4b90>] prepare_bprm_creds+0x2c/0x88 Kernel Stack: ... Call Trace: [<c0006bd4>] microblaze_unwind+0x7c/0x94 [<c0006684>] show_stack+0xf4/0x190 [<c0006730>] dump_stack+0x10/0x30 [<c00103a0>] __might_sleep+0x12c/0x160 [<c0090de4>] file_read_actor+0x1d8/0x2a8 [<c0091568>] generic_file_aio_read+0x6b4/0xa64 [<c00cd778>] do_sync_read+0xac/0x110 [<c00ce254>] vfs_read+0xc8/0x160 [<c00d585c>] kernel_read+0x38/0x64 [<c00d5984>] prepare_binprm+0xfc/0x130 [<c00d6430>] do_execve+0x228/0x370 [<c000614c>] microblaze_execve+0x58/0xa4 caused by file_read_actor (mm/filemap.c) which calls __copy_to_user_inatomic. Signed-off-by: NMichal Simek <monstr@monstr.eu>
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由 Linus Torvalds 提交于
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由 Trond Myklebust 提交于
nfs_commit_inode() needs to be defined irrespectively of whether or not we are supporting NFSv3 and NFSv4. Allow the compiler to optimise away code in the NFSv2-only case by converting it into an inlined stub function. Reported-and-tested-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 31 7月, 2010 9 次提交
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由 Linus Torvalds 提交于
* master.kernel.org:/home/rmk/linux-2.6-arm: cyber2000fb: fix console in truecolor modes cyber2000fb: fix machine hang on module load SA1111: Eliminate use after free ARM: Fix Versatile/Realview/VExpress MMC card detection sense ARM: 6279/1: highmem: fix SMP preemption bug in kmap_high_l1_vipt ARM: Add barriers to io{read,write}{8,16,32} accessors as well ARM: 6273/1: Add barriers to the I/O accessors if ARM_DMA_MEM_BUFFERABLE ARM: 6272/1: Convert L2x0 to use the IO relaxed operations ARM: 6271/1: Introduce *_relaxed() I/O accessors ARM: 6275/1: ux500: don't use writeb() in uncompress.h ARM: 6270/1: clean files in arch/arm/boot/compressed/ ARM: Fix csum_partial_copy_from_user()
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git://git.linux-nfs.org/projects/trondmy/nfs-2.6由 Linus Torvalds 提交于
* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: NFS: Ensure that writepage respects the nonblock flag NFS: kswapd must not block in nfs_release_page nfs: include space for the NUL in root path
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git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6由 Linus Torvalds 提交于
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: drm/edid: Fix the HDTV hack sync adjustment drm/radeon/kms: fix radeon mid power profile reporting
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由 Hugh Dickins 提交于
Debian's ia64 autobuilders have been seeing kernel freeze or reboot when running the gdb testsuite (Debian bug 588574): dannf bisected to 2.6.32 62eede62 "mm: ZERO_PAGE without PTE_SPECIAL"; and reproduced it with gdb's gcore on a simple target. I'd missed updating the gate_vma handling in __get_user_pages(): that happens to use vm_normal_page() (nowadays failing on the zero page), yet reported success even when it failed to get a page - boom when access_process_vm() tried to copy that to its intermediate buffer. Fix this, resisting cleanups: in particular, leave it for now reporting success when not asked to get any pages - very probably safe to change, but let's not risk it without testing exposure. Why did ia64 crash with 16kB pages, but succeed with 64kB pages? Because setup_gate() pads each 64kB of its gate area with zero pages. Reported-by: NAndreas Barth <aba@not.so.argh.org> Bisected-by: Ndann frazier <dannf@debian.org> Signed-off-by: NHugh Dickins <hughd@google.com> Tested-by: Ndann frazier <dannf@dannf.org> Cc: stable@kernel.org Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 David Howells 提交于
Remove the __exit mark from cifs_exit_dns_resolver() as it's called by the module init routine in case of error, and so may have been discarded during linkage. Signed-off-by: NDavid Howells <dhowells@redhat.com> Acked-by: NJeff Layton <jlayton@redhat.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Ondrej Zary 提交于
Return value was not set to 0 in setcolreg() with truecolor modes. This causes fb_set_cmap() to abort after first color, resulting in blank palette - and blank console in 24bpp and 32bpp modes. Signed-off-by: NOndrej Zary <linux@rainbow-software.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Ondrej Zary 提交于
I was testing two CyberPro 2000 based PCI cards on x86 and the machine always hanged completely when the cyber2000fb module was loaded. It seems that the card hangs when some registers are accessed too quickly after writing RAMDAC control register. With this patch, both card work. Add delay after RAMDAC control register write to prevent hangs on module load. Signed-off-by: NOndrej Zary <linux@rainbow-software.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Julia Lawall 提交于
__sa1111_remove always frees its argument, so the subsequent reference to sachip->saved_state represents a use after free. __sa1111_remove does not appear to use the saved_state field, so the patch simply frees it first. A simplified version of the semantic patch that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression E,E2; @@ __sa1111_remove(E) ... ( E = E2 | * E ) // </smpl> Signed-off-by: NJulia Lawall <julia@diku.dk> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Russell King 提交于
The MMC card detection sense has become really confused with negations at various levels, leading to some platforms not detecting inserted cards. Fix this by converting everything to positive logic throughout, thereby getting rid of these negations. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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