[PATCH v3 3/6] powerpc/32: Remove sync from _switch
From: Nicholas Piggin <npiggin@gmail.com>
Date: 2023-06-06 13:28:11
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
64-bit has removed the sync from _switch since commit 9145effd626d1
("powerpc/64: Drop explicit hwsync in context switch"). The same
logic there should apply to 32-bit. Remove the sync and replace with
a placeholder comment (32 and 64 will be merged with a later change).
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/kernel/entry_32.S | 8 +-------
1 file changed, 1 insertion(+), 7 deletions(-)
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 47f0dd9a45ad..089432128571 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S@@ -243,13 +243,7 @@ _GLOBAL(_switch) stw r10,_CCR(r1) stw r1,KSP(r3) /* Set old stack pointer */ -#ifdef CONFIG_SMP - /* We need a sync somewhere here to make sure that if the - * previous task gets rescheduled on another CPU, it sees all - * stores it has performed on this one. - */ - sync -#endif /* CONFIG_SMP */ + /* The sync for SMP migration is taken care of, see entry_64.S */ tophys(r0,r4) mtspr SPRN_SPRG_THREAD,r0 /* Update current THREAD phys addr */
--
2.40.1