No need to use NULL, just use 0 The result of operator= cannot be an l-value
No need to use NULL, just use 0
The result of operator= cannot be an l-value

--HG--
extra : convert_revision : df97a57f466e3498bd5a29638cb9912c7f3e1bd4

cancro7/gem5,gedare/gem5,zlfben/gem5,aclifton/cpeg853-gem5,joerocklin/gem5,rallylee/gem5,aclifton/cpeg853-gem5,kaiyuanl/gem5,joerocklin/gem5,cancro7/gem5,kaiyuanl/gem5,aclifton/cpeg853-gem5,zlfben/gem5,sobercoder/gem5,Weil0ng/gem5,briancoutinho0905/2dsampling,Weil0ng/gem5,TUD-OS/gem5-dtu,gem5/gem5,KuroeKurose/gem5,yb-kim/gemV,gedare/gem5,austinharris/gem5-riscv,KuroeKurose/gem5,cancro7/gem5,gedare/gem5,rallylee/gem5,austinharris/gem5-riscv,austinharris/gem5-riscv,joerocklin/gem5,rjschof/gem5,Weil0ng/gem5,qizenguf/MLC-STT,yb-kim/gemV,zlfben/gem5,SanchayanMaity/gem5,joerocklin/gem5,qizenguf/MLC-STT,SanchayanMaity/gem5,powerjg/gem5-ci-test,samueldotj/TeeRISC-Simulator,austinharris/gem5-riscv,qizenguf/MLC-STT,markoshorro/gem5,HwisooSo/gemV-update,HwisooSo/gemV-update,Weil0ng/gem5,HwisooSo/gemV-update,TUD-OS/gem5-dtu,SanchayanMaity/gem5,aclifton/cpeg853-gem5,powerjg/gem5-ci-test,cancro7/gem5,Weil0ng/gem5,kaiyuanl/gem5,markoshorro/gem5,markoshorro/gem5,SanchayanMaity/gem5,kaiyuanl/gem5,aclifton/cpeg853-gem5,powerjg/gem5-ci-test,HwisooSo/gemV-update,TUD-OS/gem5-dtu,markoshorro/gem5,qizenguf/MLC-STT,joerocklin/gem5,rjschof/gem5,aclifton/cpeg853-gem5,briancoutinho0905/2dsampling,sobercoder/gem5,qizenguf/MLC-STT,SanchayanMaity/gem5,samueldotj/TeeRISC-Simulator,sobercoder/gem5,qizenguf/MLC-STT,zlfben/gem5,sobercoder/gem5,cancro7/gem5,rjschof/gem5,samueldotj/TeeRISC-Simulator,SanchayanMaity/gem5,powerjg/gem5-ci-test,austinharris/gem5-riscv,zlfben/gem5,yb-kim/gemV,joerocklin/gem5,briancoutinho0905/2dsampling,joerocklin/gem5,sobercoder/gem5,rjschof/gem5,zlfben/gem5,rallylee/gem5,TUD-OS/gem5-dtu,KuroeKurose/gem5,gem5/gem5,briancoutinho0905/2dsampling,HwisooSo/gemV-update,kaiyuanl/gem5,rallylee/gem5,powerjg/gem5-ci-test,powerjg/gem5-ci-test,yb-kim/gemV,qizenguf/MLC-STT,gem5/gem5,HwisooSo/gemV-update,gem5/gem5,HwisooSo/gemV-update,sobercoder/gem5,kaiyuanl/gem5,samueldotj/TeeRISC-Simulator,KuroeKurose/gem5,briancoutinho0905/2dsampling,KuroeKurose/gem5,KuroeKurose/gem5,TUD-OS/gem5-dtu,yb-kim/gemV,yb-kim/gemV,zlfben/gem5,briancoutinho0905/2dsampling,joerocklin/gem5,cancro7/gem5,TUD-OS/gem5-dtu,gedare/gem5,yb-kim/gemV,samueldotj/TeeRISC-Simulator,rallylee/gem5,cancro7/gem5,briancoutinho0905/2dsampling,markoshorro/gem5,samueldotj/TeeRISC-Simulator,gem5/gem5,samueldotj/TeeRISC-Simulator,rjschof/gem5,austinharris/gem5-riscv,powerjg/gem5-ci-test,TUD-OS/gem5-dtu,Weil0ng/gem5,Weil0ng/gem5,gem5/gem5,markoshorro/gem5,rjschof/gem5,SanchayanMaity/gem5,gem5/gem5,KuroeKurose/gem5,gedare/gem5,rjschof/gem5,sobercoder/gem5,rallylee/gem5,markoshorro/gem5,rallylee/gem5,austinharris/gem5-riscv,gedare/gem5,kaiyuanl/gem5,yb-kim/gemV,gedare/gem5,aclifton/cpeg853-gem5