Revert "Disable the timer signal while blocked in select() (#5991)"
Revert "Disable the timer signal while blocked in select() (#5991)"

This reverts commit dd24d6bc37879c6b32a3d5ac4ee765e59e13501c.

This attempt to fix the problem was misguided: the program might be
stuck in a foreign call rather than awaitEvent(), and then the timer
signal will never get disabled.  The only way to turn off the timer
signal in this case is in the timer interrupt handler itself.

snoyberg/ghc,fmthoma/ghc,hferreiro/replay,ezyang/ghc,olsner/ghc,oldmanmike/ghc,mettekou/ghc,anton-dessiatov/ghc,ml9951/ghc,mfine/ghc,jstolarek/ghc,fmthoma/ghc,ezyang/ghc,ezyang/ghc,acowley/ghc,mettekou/ghc,christiaanb/ghc,gridaphobe/ghc,ml9951/ghc,nathyong/microghc-ghc,nkaretnikov/ghc,forked-upstream-packages-for-ghcjs/ghc,ezyang/ghc,siddhanathan/ghc,lukexi/ghc-7.8-arm64,forked-upstream-packages-for-ghcjs/ghc,da-x/ghc,wxwxwwxxx/ghc,holzensp/ghc,hferreiro/replay,anton-dessiatov/ghc,christiaanb/ghc,green-haskell/ghc,olsner/ghc,anton-dessiatov/ghc,mettekou/ghc,ekmett/ghc,mcschroeder/ghc,nathyong/microghc-ghc,tjakway/ghcjvm,vTurbine/ghc,ryantm/ghc,sgillespie/ghc,tibbe/ghc,urbanslug/ghc,sdiehl/ghc,jstolarek/ghc,snoyberg/ghc,ryantm/ghc,lukexi/ghc,elieux/ghc,da-x/ghc,gcampax/ghc,ekmett/ghc,fmthoma/ghc,mfine/ghc,ghc-android/ghc,siddhanathan/ghc,GaloisInc/halvm-ghc,ml9951/ghc,vTurbine/ghc,forked-upstream-packages-for-ghcjs/ghc,lukexi/ghc-7.8-arm64,bitemyapp/ghc,TomMD/ghc,nathyong/microghc-ghc,tibbe/ghc,mcschroeder/ghc,nathyong/microghc-ghc,mfine/ghc,urbanslug/ghc,shlevy/ghc,spacekitteh/smcghc,holzensp/ghc,ekmett/ghc,nushio3/ghc,siddhanathan/ghc,sdiehl/ghc,da-x/ghc,tjakway/ghcjvm,tjakway/ghcjvm,olsner/ghc,shlevy/ghc,acowley/ghc,gridaphobe/ghc,urbanslug/ghc,nkaretnikov/ghc,snoyberg/ghc,oldmanmike/ghc,AlexanderPankiv/ghc,sgillespie/ghc,mcschroeder/ghc,ml9951/ghc,TomMD/ghc,GaloisInc/halvm-ghc,sdiehl/ghc,vikraman/ghc,siddhanathan/ghc,ghc-android/ghc,vikraman/ghc,da-x/ghc,mcschroeder/ghc,ml9951/ghc,elieux/ghc,christiaanb/ghc,christiaanb/ghc,hferreiro/replay,nushio3/ghc,AlexanderPankiv/ghc,shlevy/ghc,mettekou/ghc,lukexi/ghc-7.8-arm64,gridaphobe/ghc,mfine/ghc,sgillespie/ghc,frantisekfarka/ghc-dsi,ghc-android/ghc,christiaanb/ghc,nushio3/ghc,sdiehl/ghc,AlexanderPankiv/ghc,wxwxwwxxx/ghc,christiaanb/ghc,nkaretnikov/ghc,spacekitteh/smcghc,vTurbine/ghc,frantisekfarka/ghc-dsi,siddhanathan/ghc,jstolarek/ghc,ghc-android/ghc,nkaretnikov/ghc,shlevy/ghc,TomMD/ghc,sgillespie/ghc,mfine/ghc,elieux/ghc,acowley/ghc,mettekou/ghc,frantisekfarka/ghc-dsi,gcampax/ghc,tibbe/ghc,TomMD/ghc,mcschroeder/ghc,snoyberg/ghc,anton-dessiatov/ghc,oldmanmike/ghc,nathyong/microghc-ghc,TomMD/ghc,gridaphobe/ghc,vikraman/ghc,elieux/ghc,mettekou/ghc,holzensp/ghc,tjakway/ghcjvm,vTurbine/ghc,lukexi/ghc,sdiehl/ghc,GaloisInc/halvm-ghc,spacekitteh/smcghc,anton-dessiatov/ghc,forked-upstream-packages-for-ghcjs/ghc,fmthoma/ghc,frantisekfarka/ghc-dsi,gridaphobe/ghc,christiaanb/ghc,jstolarek/ghc,mcschroeder/ghc,nathyong/microghc-ghc,da-x/ghc,oldmanmike/ghc,bitemyapp/ghc,vTurbine/ghc,hferreiro/replay,bitemyapp/ghc,nushio3/ghc,lukexi/ghc,vikraman/ghc,mfine/ghc,tibbe/ghc,sgillespie/ghc,shlevy/ghc,vikraman/ghc,siddhanathan/ghc,acowley/ghc,olsner/ghc,shlevy/ghc,elieux/ghc,mfine/ghc,acowley/ghc,nkaretnikov/ghc,anton-dessiatov/ghc,nushio3/ghc,vikraman/ghc,wxwxwwxxx/ghc,da-x/ghc,ryantm/ghc,gcampax/ghc,wxwxwwxxx/ghc,fmthoma/ghc,sgillespie/ghc,gcampax/ghc,spacekitteh/smcghc,elieux/ghc,hferreiro/replay,mcschroeder/ghc,forked-upstream-packages-for-ghcjs/ghc,urbanslug/ghc,urbanslug/ghc,GaloisInc/halvm-ghc,jstolarek/ghc,fmthoma/ghc,GaloisInc/halvm-ghc,wxwxwwxxx/ghc,urbanslug/ghc,vikraman/ghc,da-x/ghc,wxwxwwxxx/ghc,ghc-android/ghc,gcampax/ghc,GaloisInc/halvm-ghc,nathyong/microghc-ghc,olsner/ghc,hferreiro/replay,acowley/ghc,snoyberg/ghc,tjakway/ghcjvm,frantisekfarka/ghc-dsi,mettekou/ghc,green-haskell/ghc,wxwxwwxxx/ghc,vTurbine/ghc,ml9951/ghc,nushio3/ghc,ezyang/ghc,olsner/ghc,forked-upstream-packages-for-ghcjs/ghc,ghc-android/ghc,vTurbine/ghc,TomMD/ghc,ryantm/ghc,hferreiro/replay,oldmanmike/ghc,snoyberg/ghc,nkaretnikov/ghc,sdiehl/ghc,anton-dessiatov/ghc,gridaphobe/ghc,oldmanmike/ghc,green-haskell/ghc,nkaretnikov/ghc,fmthoma/ghc,ezyang/ghc,elieux/ghc,bitemyapp/ghc,GaloisInc/halvm-ghc,lukexi/ghc-7.8-arm64,TomMD/ghc,shlevy/ghc,forked-upstream-packages-for-ghcjs/ghc,sdiehl/ghc,gcampax/ghc,tibbe/ghc,ezyang/ghc,ryantm/ghc,bitemyapp/ghc,urbanslug/ghc,acowley/ghc,ekmett/ghc,ml9951/ghc,ml9951/ghc,holzensp/ghc,gridaphobe/ghc,tjakway/ghcjvm,siddhanathan/ghc,oldmanmike/ghc,AlexanderPankiv/ghc,spacekitteh/smcghc,lukexi/ghc,ghc-android/ghc,tjakway/ghcjvm,gcampax/ghc,sgillespie/ghc,green-haskell/ghc,nushio3/ghc,lukexi/ghc-7.8-arm64,holzensp/ghc,AlexanderPankiv/ghc,ekmett/ghc,lukexi/ghc,green-haskell/ghc,AlexanderPankiv/ghc,snoyberg/ghc,AlexanderPankiv/ghc,olsner/ghc