#ifndef __ASM_GENERIC_IPCBUF_H #define __ASM_GENERIC_IPCBUF_H /* * The generic ipc64_perm structure: * Note extra padding because this structure is passed back and forth * between kernel and user space. * * ipc64_perm was originally meant to be architecture specific, but * everyone just ended up making identical copies without specific * optimizations, so we may just as well all use the same one. * * Pad space is left for: * - 32-bit mode_t on architectures that only had 16 bit * - 32-bit seq * - 2 miscellaneous 32-bit values */ struct ipc64_perm { __kernel_key_t key; __kernel_uid32_t uid; __kernel_gid32_t gid; __kernel_uid32_t cuid; __kernel_gid32_t cgid; __kernel_mode_t mode; /* pad if mode_t is u16: */ unsigned char __pad1[4 - sizeof(__kernel_mode_t)]; unsigned short seq; unsigned short __pad2; __kernel_ulong_t __unused1; __kernel_ulong_t __unused2; }; #endif /* __ASM_GENERIC_IPCBUF_H */ /td>
net-next plumbingsTobias Klauser
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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2017-02-03 17:10:28 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2017-02-08 23:36:29 +1100
commitd7df2443cd5f67fc6ee7c05a88e4996e8177f91b (patch)
tree098a7c0ca4fceb8a65cb1f693c9d71990388933d /include/dt-bindings/gpio/tegra-gpio.h
parenta0615a16f7d0ceb5804d295203c302d496d8ee91 (diff)
powerpc/mm: Fix spurrious segfaults on radix with autonuma
When autonuma (Automatic NUMA balancing) marks a PTE inaccessible it clears all the protection bits but leave the PTE valid. With the Radix MMU, an attempt at executing from such a PTE will take a fault with bit 35 of SRR1 set "SRR1_ISI_N_OR_G". It is thus incorrect to treat all such faults as errors. We should pass them to handle_mm_fault() for autonuma to deal with. The case of pages that are really not executable is handled by the existing test for VM_EXEC further down. That leaves us with catching the kernel attempts at executing user pages. We can catch that earlier, even before we do find_vma. It is never valid on powerpc for the kernel to take an exec fault to begin with. So fold that test with the existing test for the kernel faulting on kernel addresses to bail out early. Fixes: 1d18ad026844 ("powerpc/mm: Detect instruction fetch denied and report") Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'include/dt-bindings/gpio/tegra-gpio.h')