- 17 Oct, 2015 16 commits
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Vineet Gupta authored
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
This frees up some bits to hold more high level info such as PAE being present, w/o increasing the size of already bloated cpuinfo struct Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
It was generating warnings when called as write_aux_reg(x, paddr >> 32) Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
This is done by improving the laddering logic ! Before: if Exception goto excep_or_pure_k_ret if !Interrupt(L2) goto l1_chk else INTERRUPT_EPILOGUE 2 l1_chk: if !Interrupt(L1) (i.e. pure kernel mode) goto excep_or_pure_k_ret else INTERRUPT_EPILOGUE 1 excep_or_pure_k_ret: EXCEPTION_EPILOGUE Now: if !Interrupt(L1 or L2) (i.e. exception or pure kernel mode) goto excep_or_pure_k_ret ; guaranteed to be an interrupt if !Interrupt(L2) goto l1_ret else INTERRUPT_EPILOGUE 2 ; by virtue of above, no need to chk for L1 active l1_ret: INTERRUPT_EPILOGUE 1 excep_or_pure_k_ret: EXCEPTION_EPILOGUE Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
The requirement is to - Reenable Exceptions (AE cleared) - Reenable Interrupts (E1/E2 set) We need to do wiggle these bits into ERSTATUS and call RTIE. Prev version used the pre-exception STATUS32 as starting point for what goes into ERSTATUS. This required explicit fixups of U/DE/L bits. Instead, use the current (in-exception) STATUS32 as starting point. Being in exception handler U/DE/L can be safely assumed to be correct. Only AE/E1/E2 need to be fixed. So the new implementation is slightly better -Avoids read form memory -Is 4 bytes smaller for the typical 1 level of intr configuration -Depicts the semantics more clearly Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
Historically this was done by ARC IDE driver, which is long gone. IRQ core is pretty robust now and already checks if IRQs are enabled in hard ISRs. Thus no point in checking this in arch code, for every call of irq enabled. Further if some driver does do that - let it bring down the system so we notice/fix this sooner than covering up for sucker This makes local_irq_enable() - for L1 only case atleast simple enough so we can inline it. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
Implement the TLB flush routine to evict a sepcific Super TLB entry, vs. moving to a new ASID on every such flush. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
ARCHes with special requirements for evicting THP backing TLB entries can implement this. Otherwise also, it can help optimize TLB flush in THP regime. stock flush_tlb_range() typically has optimization to nuke the entire TLB if flush span is greater than a certain threshhold, which will likely be true for a single huge page. Thus a single thp flush will invalidate the entrire TLB which is not desirable. e.g. see arch/arc: flush_pmd_tlb_range Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Link: http://lkml.kernel.org/r/20151009100816.GC7873@nodeSigned-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
- pgtable-generic.c: Fold individual #ifdef for each helper into a top level #ifdef. Makes code more readable - Converted the stub helpers for !THP to BUILD_BUG() vs. runtime BUG() Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Link: http://lkml.kernel.org/r/20151009133450.GA8597@nodeSigned-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
This reduces/simplifies the diff for the next patch which moves THP specific code. No semantical changes ! Acked-by: Kirill A. Shutemov kirill.shutemov@linux.intel.com Link: http://lkml.kernel.org/r/1442918096-17454-9-git-send-email-vgupta@synopsys.comSigned-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
MMUv4 in HS38x cores supports Super Pages which are basis for Linux THP support. Normal and Super pages can co-exist (ofcourse not overlap) in TLB with a new bit "SZ" in TLB page desciptor to distinguish between them. Super Page size is configurable in hardware (4K to 16M), but fixed once RTL builds. The exact THP size a Linx configuration will support is a function of: - MMU page size (typical 8K, RTL fixed) - software page walker address split between PGD:PTE:PFN (typical 11:8:13, but can be changed with 1 line) So for above default, THP size supported is 8K * 256 = 2M Default Page Walker is 2 levels, PGD:PTE:PFN, which in THP regime reduces to 1 level (as PTE is folded into PGD and canonically referred to as PMD). Thus thp PMD accessors are implemented in terms of PTE (just like sparc) Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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- 09 Oct, 2015 4 commits
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Vineet Gupta authored
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
Needed for THP, but will also come in handy for fast GUP later Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
No semantical changes Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Vineet Gupta authored
ARC is the only arch with unsigned long type (vs. struct page *). Historically this was done to avoid the page_address() calls in various arch hooks which need to get the virtual/logical address of the table. Some arches alternately define it as pte_t *, and is as efficient as unsigned long (generated code doesn't change) Suggested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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- 04 Oct, 2015 6 commits
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tileLinus Torvalds authored
Pull strscpy string copy function implementation from Chris Metcalf. Chris sent this during the merge window, but I waffled back and forth on the pull request, which is why it's going in only now. The new "strscpy()" function is definitely easier to use and more secure than either strncpy() or strlcpy(), both of which are horrible nasty interfaces that have serious and irredeemable problems. strncpy() has a useless return value, and doesn't NUL-terminate an overlong result. To make matters worse, it pads a short result with zeroes, which is a performance disaster if you have big buffers. strlcpy(), by contrast, is a mis-designed "fix" for strlcpy(), lacking the insane NUL padding, but having a differently broken return value which returns the original length of the source string. Which means that it will read characters past the count from the source buffer, and you have to trust the source to be properly terminated. It also makes error handling fragile, since the test for overflow is unnecessarily subtle. strscpy() avoids both these problems, guaranteeing the NUL termination (but not excessive padding) if the destination size wasn't zero, and making the overflow condition very obvious by returning -E2BIG. It also doesn't read past the size of the source, and can thus be used for untrusted source data too. So why did I waffle about this for so long? Every time we introduce a new-and-improved interface, people start doing these interminable series of trivial conversion patches. And every time that happens, somebody does some silly mistake, and the conversion patch to the improved interface actually makes things worse. Because the patch is mindnumbing and trivial, nobody has the attention span to look at it carefully, and it's usually done over large swatches of source code which means that not every conversion gets tested. So I'm pulling the strscpy() support because it *is* a better interface. But I will refuse to pull mindless conversion patches. Use this in places where it makes sense, but don't do trivial patches to fix things that aren't actually known to be broken. * 'strscpy' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: tile: use global strscpy() rather than private copy string: provide strscpy() Make asm/word-at-a-time.h available on all architectures
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git://neil.brown.name/mdLinus Torvalds authored
Pull md fixes from Neil Brown: "Assorted fixes for md in 4.3-rc. Two tagged for -stable, and one is really a cleanup to match and improve kmemcache interface. * tag 'md/4.3-fixes' of git://neil.brown.name/md: md/bitmap: don't pass -1 to bitmap_storage_alloc. md/raid1: Avoid raid1 resync getting stuck md: drop null test before destroy functions md: clear CHANGE_PENDING in readonly array md/raid0: apply base queue limits *before* disk_stack_limits md/raid5: don't index beyond end of array in need_this_block(). raid5: update analysis state for failed stripe md: wait for pending superblock updates before switching to read-only
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git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds authored
Pull MIPS updates from Ralf Baechle: "This week's round of MIPS fixes: - Fix JZ4740 build - Fix fallback to GFP_DMA - FP seccomp in case of ENOSYS - Fix bootmem panic - A number of FP and CPS fixes - Wire up new syscalls - Make sure BPF assembler objects can properly be disassembled - Fix BPF assembler code for MIPS I" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: MIPS: scall: Always run the seccomp syscall filters MIPS: Octeon: Fix kernel panic on startup from memory corruption MIPS: Fix R2300 FP context switch handling MIPS: Fix octeon FP context switch handling MIPS: BPF: Fix load delay slots. MIPS: BPF: Do all exports of symbols with FEXPORT(). MIPS: Fix the build on jz4740 after removing the custom gpio.h MIPS: CPS: #ifdef on CONFIG_MIPS_MT_SMP rather than CONFIG_MIPS_MT MIPS: CPS: Don't include MT code in non-MT kernels. MIPS: CPS: Stop dangling delay slot from has_mt. MIPS: dma-default: Fix 32-bit fall back to GFP_DMA MIPS: Wire up userfaultfd and membarrier syscalls.
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull irq fixes from Thomas Gleixner: "This update contains: - Fix for a long standing race affecting /proc/irq/NNN - One line fix for ARM GICV3-ITS counting the wrong data - Warning silencing in ARM GICV3-ITS. Another GCC trying to be overly clever issue" * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqchip/gic-v3-its: Count additional LPIs for the aliased devices irqchip/gic-v3-its: Silence warning when its_lpi_alloc_chunks gets inlined genirq: Fix race in register_irq_proc()
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Markos Chandras authored
The MIPS syscall handler code used to return -ENOSYS on invalid syscalls. Whilst this is expected, it caused problems for seccomp filters because the said filters never had the change to run since the code returned -ENOSYS before triggering them. This caused problems on the chromium testsuite for filters looking for invalid syscalls. This has now changed and the seccomp filters are always run even if the syscall is invalid. We return -ENOSYS once we return from the seccomp filters. Moreover, similar codepaths have been merged in the process which simplifies somewhat the overall syscall code. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/11236/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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- 03 Oct, 2015 4 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 fixes from Ingo Molnar: "Fixes all around the map: W+X kernel mapping fix, WCHAN fixes, two build failure fixes for corner case configs, x32 header fix and a speling fix" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/headers/uapi: Fix __BITS_PER_LONG value for x32 builds x86/mm: Set NX on gap between __ex_table and rodata x86/kexec: Fix kexec crash in syscall kexec_file_load() x86/process: Unify 32bit and 64bit implementations of get_wchan() x86/process: Add proper bound checks in 64bit get_wchan() x86, efi, kasan: Fix build failure on !KASAN && KMEMCHECK=y kernels x86/hyperv: Fix the build in the !CONFIG_KEXEC_CORE case x86/cpufeatures: Correct spelling of the HWP_NOTIFY flag
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull timer fixes from Ingo Molnar: "An abs64() fix in the watchdog driver, and two clocksource driver NO_IRQ assumption fixes" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: clocksource: Fix abs() usage w/ 64bit values clocksource/drivers/keystone: Fix bad NO_IRQ usage clocksource/drivers/rockchip: Fix bad NO_IRQ usage
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull EFI fixes from Ingo Molnar: "Two EFI fixes: one for x86, one for ARM, fixing a boot crash bug that can trigger under newer EFI firmware" * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: arm64/efi: Fix boot crash by not padding between EFI_MEMORY_RUNTIME regions x86/efi: Fix boot crash by mapping EFI memmap entries bottom-up at runtime, instead of top-down
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git://people.freedesktop.org/~airlied/linuxLinus Torvalds authored
Pull drm fixes from Dave Airlie: "Bunch of fixes all over the place, all pretty small: amdgpu, i915, exynos, one qxl and one vmwgfx. There is also a bunch of mst fixes, I left some cleanups in the series as I didn't think it was worth splitting up the tested series" * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (37 commits) drm/dp/mst: add some defines for logical/physical ports drm/dp/mst: drop cancel work sync in the mstb destroy path (v2) drm/dp/mst: split connector registration into two parts (v2) drm/dp/mst: update the link_address_sent before sending the link address (v3) drm/dp/mst: fixup handling hotplug on port removal. drm/dp/mst: don't pass port into the path builder function drm/radeon: drop radeon_fb_helper_set_par drm: handle cursor_set2 in restore_fbdev_mode drm/exynos: Staticize local function in exynos_drm_gem.c drm/exynos: fimd: actually disable dp clock drm/exynos: dp: remove suspend/resume functions drm/qxl: recreate the primary surface when the bo is not primary drm/amdgpu: only print meaningful VM faults drm/amdgpu/cgs: remove import_gpu_mem drm/i915: Call non-locking version of drm_kms_helper_poll_enable(), v2 drm: Add a non-locking version of drm_kms_helper_poll_enable(), v2 drm/vmwgfx: Fix a command submission hang regression drm/exynos: remove unused mode_fixup() code drm/exynos: remove decon_mode_fixup() drm/exynos: remove fimd_mode_fixup() ...
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- 02 Oct, 2015 10 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/inputLinus Torvalds authored
Pull input layer fixes from Dmitry Torokhov: "Fixes for two recent regressions (in Synaptics PS/2 and uinput drivers) and some more driver fixups" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Revert "Input: synaptics - fix handling of disabling gesture mode" Input: psmouse - fix data race in __ps2_command Input: elan_i2c - add all valid ic type for i2c/smbus Input: zhenhua - ensure we have BITREVERSE Input: omap4-keypad - fix memory leak Input: serio - fix blocking of parport Input: uinput - fix crash when using ABS events Input: elan_i2c - expand maximum product_id form 0xFF to 0xFFFF Input: elan_i2c - add ic type 0x03 Input: elan_i2c - don't require known iap version Input: imx6ul_tsc - fix controller name Input: imx6ul_tsc - use the preferred method for kzalloc() Input: imx6ul_tsc - check for negative return value Input: imx6ul_tsc - propagate the errors Input: walkera0701 - fix abs() calculations on 64 bit values Input: mms114 - remove unneded semicolons Input: pm8941-pwrkey - remove unneded semicolon Input: fix typo in MT documentation Input: cyapa - fix address of Gen3 devices in device tree documentation
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John Stultz authored
This patch fixes one cases where abs() was being used with 64-bit nanosecond values, where the result may be capped at 32-bits. This potentially could cause watchdog false negatives on 32-bit systems, so this patch addresses the issue by using abs64(). Signed-off-by: John Stultz <john.stultz@linaro.org> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Richard Cochran <richardcochran@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/1442279124-7309-2-git-send-email-john.stultz@linaro.orgSigned-off-by: Thomas Gleixner <tglx@linutronix.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linuxLinus Torvalds authored
Pull arm64 fixes from Catalin Marinas: - Fix for transparent huge page change_protection() logic which was inadvertently changing a huge pmd page into a pmd table entry. - Function graph tracer panic fix caused by the return_to_handler code corrupting the multi-regs function return value (composite types). * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: ftrace: fix function_graph tracer panic arm64: Fix THP protection change logic
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git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68kLinus Torvalds authored
Pull m68k updates from Geert Uytterhoeven: "Summary: - Fix for accidental modification of arguments of syscall functions - Wire up new syscalls - Update defconfigs" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k/defconfig: Update defconfigs for v4.3-rc1 m68k: Define asmlinkage_protect m68k: Wire up membarrier m68k: Wire up userfaultfd m68k: Wire up direct socket calls
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Marc Zyngier authored
When configuring the interrupt mapping for a new device, we iterate over all the possible aliases to account for their maximum MSI allocation. This was introduced by e8137f4f ("irqchip: gicv3-its: Iterate over PCI aliases to generate ITS configuration"). Turns out that the code doing that is a bit braindead, and repeatedly accounts for the same device over and over. Fix this by counting the actual alias that is passed to us by the core code. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-arm-kernel@lists.infradead.org Cc: Alex Shi <alex.shi@linaro.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: David Daney <ddaney.cavm@gmail.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1443800646-8074-3-git-send-email-marc.zyngier@arm.comSigned-off-by: Thomas Gleixner <tglx@linutronix.de>
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Marc Zyngier authored
More agressive inlining in recent versions of GCC have uncovered a new set of warnings: drivers/irqchip/irq-gic-v3-its.c: In function its_msi_prepare: drivers/irqchip/irq-gic-v3-its.c:1148:26: warning: lpi_base may be used uninitialized in this function [-Wmaybe-uninitialized] dev->event_map.lpi_base = lpi_base; ^ drivers/irqchip/irq-gic-v3-its.c:1116:6: note: lpi_base was declared here int lpi_base; ^ drivers/irqchip/irq-gic-v3-its.c:1149:25: warning: nr_lpis may be used uninitialized in this function [-Wmaybe-uninitialized] dev->event_map.nr_lpis = nr_lpis; ^ drivers/irqchip/irq-gic-v3-its.c:1117:6: note: nr_lpis was declared here int nr_lpis; ^ The warning is fairly benign (there is no code path that could actually use uninitialized variables), but let's silence it anyway by zeroing the variables on the error path. Reported-by: Alex Shi <alex.shi@linaro.org> Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-arm-kernel@lists.infradead.org Cc: David Daney <ddaney.cavm@gmail.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1443800646-8074-2-git-send-email-marc.zyngier@arm.comSigned-off-by: Thomas Gleixner <tglx@linutronix.de>
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git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds authored
Pull dmaengine fixes from Vinod Koul: "This contains fixes spread throughout the drivers, and also fixes one more instance of privatecnt in dmaengine. Driver fixes summary: - bunch of pxa_dma fixes for reuse of descriptor issue, residue and no-requestor - odd fixes in xgene, idma, sun4i and zxdma - at_xdmac fixes for cleaning descriptor and block addr mode" * tag 'dmaengine-fix-4.3-rc4' of git://git.infradead.org/users/vkoul/slave-dma: dmaengine: pxa_dma: fix residue corner case dmaengine: pxa_dma: fix the no-requestor case dmaengine: zxdma: Fix off-by-one for testing valid pchan request dmaengine: at_xdmac: clean used descriptor dmaengine: at_xdmac: change block increment addressing mode dmaengine: dw: properly read DWC_PARAMS register dmaengine: xgene-dma: Fix overwritting DMA tx ring dmaengine: fix balance of privatecnt dmaengine: sun4i: fix unsafe list iteration dmaengine: idma64: improve residue estimation dmaengine: xgene-dma: fix handling xgene_dma_get_ring_size result dmaengine: pxa_dma: fix initial list move
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git://git.kernel.dk/linux-blockLinus Torvalds authored
Pull block fixes from Jens Axboe: "Another week, another round of fixes. These have been brewing for a bit and in various iterations, but I feel pretty comfortable about the quality of them. They fix real issues. The pull request is mostly blk-mq related, and the only one not fixing a real bug, is the tag iterator abstraction from Christoph. But it's pretty trivial, and we'll need it for another fix soon. Apart from the blk-mq fixes, there's an NVMe affinity fix from Keith, and a single fix for xen-blkback from Roger fixing failure to free requests on disconnect" * 'for-linus' of git://git.kernel.dk/linux-block: blk-mq: factor out a helper to iterate all tags for a request_queue blk-mq: fix racy updates of rq->errors blk-mq: fix deadlock when reading cpu_list blk-mq: avoid inserting requests before establishing new mapping blk-mq: fix q->mq_usage_counter access race blk-mq: Fix use after of free q->mq_map blk-mq: fix sysfs registration/unregistration race blk-mq: avoid setting hctx->tags->cpumask before allocation NVMe: Set affinity after allocating request queues xen/blkback: free requests on disconnection
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Dmitry Torokhov authored
This reverts commit e51e3849: we actually do want the device to work in extended W mode, as this is the mode that allows us receiving multiple contact information. Cc: stable@vger.kernel.org
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Matt Bennett authored
During development it was found that a number of builds would panic during the kernel init process, more specifically in 'delayed_fput()'. The panic showed the kernel trying to access a memory address of '0xb7fdc00' while traversing the 'delayed_fput_list' structure. Comparing this memory address to the value of the pointer used on builds that did not panic confirmed that the pointer on crashing builds must have been corrupted at some stage earlier in the init process. By traversing the list earlier and earlier in the code it was found that 'plat_mem_setup()' was responsible for corrupting the list. Specifically the line: memory = cvmx_bootmem_phy_alloc(mem_alloc_size, __pa_symbol(&__init_end), -1, 0x100000, CVMX_BOOTMEM_FLAG_NO_LOCKING); Which would eventually call: cvmx_bootmem_phy_set_size(new_ent_addr, cvmx_bootmem_phy_get_size (ent_addr) - (desired_min_addr - ent_addr)); Where 'new_ent_addr'=0x4800000 (the address of 'delayed_fput_list') and the second argument (size)=0xb7fdc00 (the address causing the kernel panic). The job of this part of 'plat_mem_setup()' is to allocate chunks of memory for the kernel to use. At the start of each chunk of memory the size of the chunk is written, hence the value 0xb7fdc00 is written onto memory at 0x4800000, therefore the kernel panics when it goes back to access 'delayed_fput_list' later on in the initialisation process. On builds that were not crashing it was found that the compiler had placed 'delayed_fput_list' at 0x4800008, meaning it wasn't corrupted (but something else in memory was overwritten). As can be seen in the first function call above the code begins to allocate chunks of memory beginning from the symbol '__init_end'. The MIPS linker script (vmlinux.lds.S) however defines the .bss section to begin after '__init_end'. Therefore memory within the .bss section is allocated to the kernel to use (System.map shows 'delayed_fput_list' and other kernel structures to be in .bss). To stop the kernel panic (and the .bss section being corrupted) memory should begin being allocated from the symbol '_end'. Signed-off-by: Matt Bennett <matt.bennett@alliedtelesis.co.nz> Acked-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Cc: aleksey.makarov@auriga.com Patchwork: https://patchwork.linux-mips.org/patch/11251/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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