Add comment explaining that RWTicketSpinLock<..., true> is not reentrant
Add comment explaining that RWTicketSpinLock<..., true> is not reentrant

Test Plan: no, it's a comment

Reviewed By: zanfur@fb.com

Subscribers: folly-diffs@

FB internal diff: D1752850

Tasks: 5823969

Signature: t1:1752850:1419043661:673c68c0daad28b3fde9709e767b528b0dec8ad1


project-zerus/folly,rklabs/folly,theiver9827/folly,loverszhaokai/folly,tempbottle/folly,tempbottle/folly,stonegithubs/folly,upsoft/folly,cppfool/folly,CJstar/folly,upsoft/folly,xzmagic/folly,shaobz/folly,floxard/folly,brunomorishita/folly,renyinew/folly,SammyK/folly,cppfool/folly,SammyK/folly,cole14/folly,stonegithubs/folly,leolujuyi/folly,chjp2046/folly,bikong2/folly,bobegir/folly,upsoft/folly,zhiweicai/folly,KSreeHarsha/folly,guker/folly,stonegithubs/folly,doctaweeks/folly,clearlinux/folly,lifei/folly,Hincoin/folly,lifei/folly,rklabs/folly,theiver9827/folly,facebook/folly,yangjin-unique/folly,SammyK/folly,sakishum/folly,bikong2/folly,sakishum/folly,charsyam/folly,romange/folly,guker/folly,alexst07/folly,constantine001/folly,brunomorishita/folly,project-zerus/folly,chjp2046/folly,hongliangzhao/folly,rklabs/folly,Orvid/folly,CJstar/folly,clearlylin/folly,xzmagic/folly,project-zerus/folly,SeanRBurton/folly,doctaweeks/folly,clearlinux/folly,nickhen/folly,romange/folly,constantine001/folly,bikong2/folly,Eagle-X/folly,romange/folly,PPC64/folly,brunomorishita/folly,gaoyingie/folly,upsoft/folly,Eagle-X/folly,alexst07/folly,tomhughes/folly,bsampath/folly,leolujuyi/folly,raphaelamorim/folly,Hincoin/folly,ykarlsbrun/folly,yangjin-unique/folly,mqeizi/folly,tempbottle/folly,leolujuyi/folly,charsyam/folly,renyinew/folly,CJstar/folly,gavioto/folly,facebook/folly,arg0/folly,SammyK/folly,fw1121/folly,reddit/folly,arg0/folly,bowlofstew/folly,raphaelamorim/folly,clearlinux/folly,guker/folly,constantine001/folly,SeanRBurton/folly,cppfool/folly,romange/folly,fw1121/folly,loversInJapan/folly,ykarlsbrun/folly,juniway/folly,PPC64/folly,sakishum/folly,Hincoin/folly,loversInJapan/folly,kernelim/folly,alexst07/folly,theiver9827/folly,loversInJapan/folly,gavioto/folly,hongliangzhao/folly,floxard/folly,cppfool/folly,bowlofstew/folly,wildinto/folly,ykarlsbrun/folly,charsyam/folly,zhiweicai/folly,shaobz/folly,SeanRBurton/folly,SeanRBurton/folly,Orvid/folly,stonegithubs/folly,floxard/folly,clearlylin/folly,tempbottle/folly,fw1121/folly,wildinto/folly,PPC64/folly,sonnyhu/folly,yangjin-unique/folly,clearlylin/folly,bobegir/folly,arg0/folly,Hincoin/folly,leolujuyi/folly,juniway/folly,xzmagic/folly,KSreeHarsha/folly,arg0/folly,floxard/folly,shaobz/folly,lifei/folly,PoisonBOx/folly,cole14/folly,guker/folly,colemancda/folly,stonegithubs/folly,gaoyingie/folly,lifei/folly,Eagle-X/folly,constantine001/folly,Orvid/folly,yangjin-unique/folly,loversInJapan/folly,leolujuyi/folly,facebook/folly,wildinto/folly,upsoft/folly,juniway/folly,alexst07/folly,kernelim/folly,fw1121/folly,loverszhaokai/folly,facebook/folly,rklabs/folly,fw1121/folly,charsyam/folly,floxard/folly,romange/folly,gavioto/folly,xzmagic/folly,hongliangzhao/folly,reddit/folly,raphaelamorim/folly,nickhen/folly,bsampath/folly,nickhen/folly,project-zerus/folly,renyinew/folly,cppfool/folly,zhiweicai/folly,sonnyhu/folly,hongliangzhao/folly,project-zerus/folly,alexst07/folly,bsampath/folly,reddit/folly,tempbottle/folly,ykarlsbrun/folly,sakishum/folly,kernelim/folly,gaoyingie/folly,kernelim/folly,PoisonBOx/folly,brunomorishita/folly,theiver9827/folly,tomhughes/folly,bowlofstew/folly,chjp2046/folly,colemancda/folly,wildinto/folly,zhiweicai/folly,bsampath/folly,rklabs/folly,juniway/folly,cole14/folly,clearlylin/folly,constantine001/folly,xzmagic/folly,bowlofstew/folly,chjp2046/folly,bobegir/folly,raphaelamorim/folly,SeanRBurton/folly,shaobz/folly,tomhughes/folly,bikong2/folly,doctaweeks/folly,PPC64/folly,sakishum/folly,raphaelamorim/folly,bowlofstew/folly,wildinto/folly,brunomorishita/folly,doctaweeks/folly,tomhughes/folly,doctaweeks/folly,gavioto/folly,shaobz/folly,renyinew/folly,facebook/folly,CJstar/folly,cole14/folly,kernelim/folly,loverszhaokai/folly,Hincoin/folly,nickhen/folly,colemancda/folly,cole14/folly,bobegir/folly,hongliangzhao/folly,guker/folly,PoisonBOx/folly,colemancda/folly,arg0/folly,theiver9827/folly,yangjin-unique/folly,reddit/folly,PPC64/folly,sonnyhu/folly,clearlinux/folly,clearlinux/folly,zhiweicai/folly,chjp2046/folly,SammyK/folly,Eagle-X/folly,bsampath/folly,gavioto/folly,loverszhaokai/folly,gaoyingie/folly,renyinew/folly,nickhen/folly,gaoyingie/folly,ykarlsbrun/folly,reddit/folly,colemancda/folly,KSreeHarsha/folly,bobegir/folly,lifei/folly,mqeizi/folly,loverszhaokai/folly,tomhughes/folly,CJstar/folly,Orvid/folly,Eagle-X/folly,sonnyhu/folly,clearlylin/folly,Orvid/folly,PoisonBOx/folly,loversInJapan/folly,juniway/folly,mqeizi/folly,KSreeHarsha/folly,sonnyhu/folly,mqeizi/folly,KSreeHarsha/folly,bikong2/folly,PoisonBOx/folly,mqeizi/folly