Buildresult: powerpc-fixes/40x/ep405_defconfig/powerpc-gcc5 built on Nov 8 2018, 10:02

kisskb

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Status:	OK
Date/Time:	Nov 8 2018, 10:02
Duration:	0:00:50.657171
Builder:	ka1
Revision:	powerpc/mm/64s: Fix preempt warning in slb_allocate_kernel() (`a75a001540d03c30315e43884ad95cc68040f18d)`
Target:	powerpc-fixes/40x/ep405_defconfig/powerpc-gcc5
Branch:	powerpc-fixes
Compiler:	powerpc-gcc5 (powerpc64-linux-gcc (GCC) 5.5.0)
Config:	40x/ep405_defconfig (download)
Log:	Download original Possible warnings (1) arch/powerpc/kernel/head_40x.S:883: Warning: invalid register expression Full Log # git rev-parse -q --verify a75a001540d03c30315e43884ad95cc68040f18d^{commit} a75a001540d03c30315e43884ad95cc68040f18d already have revision, skipping fetch # git checkout -q -f -B kisskb a75a001540d03c30315e43884ad95cc68040f18d # git clean -qxdf # < git log -1 # commit a75a001540d03c30315e43884ad95cc68040f18d # Author: Michael Ellerman <mpe@ellerman.id.au> # Date: Thu Nov 1 16:21:05 2018 +1100 # # powerpc/mm/64s: Fix preempt warning in slb_allocate_kernel() # # With preempt enabled we see warnings in do_slb_fault(): # # BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u33:0/98 # futex hash table entries: 4096 (order: 3, 524288 bytes) # caller is do_slb_fault+0x204/0x230 # CPU: 5 PID: 98 Comm: kworker/u33:0 Not tainted 4.19.0-rc3-gcc-7.3.1-00022-g1936f094e164 #138 # Call Trace: # dump_stack+0xb4/0x104 (unreliable) # check_preemption_disabled+0x148/0x150 # do_slb_fault+0x204/0x230 # data_access_slb_common+0x138/0x180 # # This is caused by the get_paca() in slb_allocate_kernel(), which # includes a call to debug_smp_processor_id(). # # slb_allocate_kernel() can only be called from do_slb_fault(), and in # that path interrupts are hard disabled and so we can't be preempted, # but we can't update the preempt flags (in thread_info) because that # could cause an SLB fault. # # So just use local_paca which is safe and doesn't cause the warning. # # Fixes: 48e7b7695745 ("powerpc/64s/hash: Convert SLB miss handlers to C") # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < git log --format=%s --max-count=1 a75a001540d03c30315e43884ad95cc68040f18d # < make -s -j 8 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_ep405_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- 40x/ep405_defconfig # make -s -j 8 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_ep405_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- /kisskb/src/arch/powerpc/kernel/head_40x.S: Assembler messages: /kisskb/src/arch/powerpc/kernel/head_40x.S:883: Warning: invalid register expression INFO: Uncompressed kernel (size 0x4ee348) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x500000) Completed OK # rm -rf /kisskb/build/powerpc-fixes_40x_ep405_defconfig_powerpc-gcc5 # Build took: 0:00:50.657171

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