diff options
| author | Vineet Gupta <vgupta@kernel.org> | 2020-01-13 09:16:06 -0800 |
|---|---|---|
| committer | Vineet Gupta <vgupta@kernel.org> | 2021-08-24 14:25:48 -0700 |
| commit | 6128df5be48f48d63efdc7c52022dd163f612373 (patch) | |
| tree | 8d740e544f2125984b51b048e15042d226f9c995 /arch/arc/include/asm/entry-compact.h | |
| parent | 288ff7de62af0936353c9394de9d0b2c6dd22c80 (diff) | |
ARC: mm: use SCRATCH_DATA0 register for caching pgdir in ARCv2 only
MMU SCRATCH_DATA0 register is intended to cache task pgd. However in
ARC700 SMP port, it has to be repurposed for re-entrant interrupt
handling, while UP port doesn't. We currently handle these use-cases
using a fabricated #define which has usual issues of dependency nesting
and obvious ugliness.
So clean this up: for ARC700 don't use to cache pgd (even in UP) and do
the opposite for ARCv2.
And while here, switch to canonical pgd_offset().
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
Diffstat (limited to 'arch/arc/include/asm/entry-compact.h')
| -rw-r--r-- | arch/arc/include/asm/entry-compact.h | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/arch/arc/include/asm/entry-compact.h b/arch/arc/include/asm/entry-compact.h index 6dbf5cecc8cc..5aab4f93ab8a 100644 --- a/arch/arc/include/asm/entry-compact.h +++ b/arch/arc/include/asm/entry-compact.h @@ -126,19 +126,11 @@ * to be saved again on kernel mode stack, as part of pt_regs. *-------------------------------------------------------------*/ .macro PROLOG_FREEUP_REG reg, mem -#ifndef ARC_USE_SCRATCH_REG - sr \reg, [ARC_REG_SCRATCH_DATA0] -#else st \reg, [\mem] -#endif .endm .macro PROLOG_RESTORE_REG reg, mem -#ifndef ARC_USE_SCRATCH_REG - lr \reg, [ARC_REG_SCRATCH_DATA0] -#else ld \reg, [\mem] -#endif .endm /*-------------------------------------------------------------- |