redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

powerpc/32: don't do syscall stuff in transfer_to_handler 

As syscalls are now handled via a fast entry path, syscall related
actions can be removed from the generic transfer_to_handler path.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
hifive-unleashed-5.2
Christophe Leroy 2019-04-30 12:39:04 +00:00 committed by Michael Ellerman
parent 1a4b739bbb
commit 38b4564cf0
1 changed files with 0 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
arch/powerpc/kernel/entry_32.S
View File

@ -217,7 +217,6 @@ transfer_to_handler_cont:
*/
tophys(r12, r1)
lwz r12,_MSR(r12)
xor r12,r10,r12
andi. r12,r12,MSR_EE
bne 1f
@ -258,9 +257,6 @@ reenable_mmu:
* the rest is restored from the exception frame.
*/
/* Are we enabling or disabling interrupts ? */
andi. r0,r10,MSR_EE
stwu r1,-32(r1)
stw r9,8(r1)
stw r11,12(r1)
@ -268,8 +264,6 @@ reenable_mmu:
stw r4,20(r1)
stw r5,24(r1)
bne- 0f
/* If we are disabling interrupts (normal case), simply log it with
* lockdep
*/
@ -287,19 +281,6 @@ reenable_mmu:
mtctr r11
mtlr r9
bctr /* jump to handler */
/* If we are enabling interrupt, this is a syscall. They shouldn't
* happen while interrupts are disabled, so let's do a warning here.
*/
0: trap
EMIT_BUG_ENTRY 0b,__FILE__,__LINE__, BUGFLAG_WARNING
bl trace_hardirqs_on
/* Now enable for real */
mfmsr r10
ori r10,r10,MSR_EE
mtmsr r10
b 2b
#endif /* CONFIG_TRACE_IRQFLAGS */
#if defined (CONFIG_PPC_BOOK3S_32) || defined(CONFIG_E500)