#!/bin/sh -x # Based on the vmlinux file create the System.map file # System.map is used by module-init tools and some debugging # tools to retrieve the actual addresses of symbols in the kernel. # # Usage # mksysmap vmlinux System.map ##### # Generate System.map (actual filename passed as second argument) # $NM produces the following output: # f0081e80 T alloc_vfsmnt # The second row specify the type of the symbol: # A = Absolute # B = Uninitialised data (.bss) # C = Common symbol # D = Initialised data # G = Initialised data for small objects # I = Indirect reference to another symbol # N = Debugging symbol # R = Read only # S = Uninitialised data for small objects # T = Text code symbol # U = Undefined symbol # V = Weak symbol # W = Weak symbol # Corresponding small letters are local symbols # For System.map filter away: # a - local absolute symbols # U - undefined global symbols # N - debugging symbols # w - local weak symbols # readprofile starts reading symbols when _stext is found, and # continue until it finds a symbol which is not either of 'T', 't', # 'W' or 'w'. __crc_ are 'A' and placed in the middle # so we just ignore them to let readprofile continue to work. # (At least sparc64 has __crc_ in the middle). $NM -n $1 | grep -v '\( [aNUw] \)\|\(__crc_\)\|\( \$[adt]\)\|\( .L\)' > $2 back'>packet-rx-pump-back 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 /net/rds/tcp_send.c
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 'net/rds/tcp_send.c')