> [snip] > > diff --git a/arch/powerpc/kernel/head_booke.h > > b/arch/powerpc/kernel/head_booke.h > > index fce2df9..4f802df 100644 > > --- a/arch/powerpc/kernel/head_booke.h > > +++ b/arch/powerpc/kernel/head_booke.h > > @@ -20,7 +20,9 @@ > > beq 1f; \ > > mfspr r1,SPRN_SPRG3; /* if from user, start at top of */\ > > lwz r1,THREAD_INFO-THREAD(r1); /* this thread's kernel stack */\ > > - addi r1,r1,THREAD_SIZE; \ > > + lis r11,[EMAIL PROTECTED]; \ > > + ori r11,r11,[EMAIL PROTECTED]; > > \ > > + add r1,r1,r11; > > \ > > It would be nice if we could avoid the extra instruction here when the > page sizes isn't big enough to require it.
As a matter of fact, I don't see why THREAD_SIZE should ever need that, there is no reason to change the kernel stack size. > > 1: subi r1,r1,INT_FRAME_SIZE; /* Allocate an exception frame */\ > > mr r11,r1; \ > > stw r10,_CCR(r11); /* save various registers */\ > > @@ -112,7 +114,8 @@ > > andi. r10,r10,MSR_PR; \ > > mfspr r11,SPRN_SPRG3; /* if from user, start at top of */\ > > lwz r11,THREAD_INFO-THREAD(r11); /* this thread's kernel stack */\ > > - addi r11,r11,EXC_LVL_FRAME_OVERHEAD; /* allocate stack frame */\ > > + addis r11,r11,[EMAIL PROTECTED]; /* allocate stack frame */\ > > + addi r11,r11,[EMAIL PROTECTED]; /* allocate stack frame */\ > > And here. Same comment. That size doesn't need to change and can remain safely below 32k Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
