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authorMichael Ellerman <mpe@ellerman.id.au>2014-07-10 12:29:21 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2014-07-28 14:10:24 +1000
commitcec15488c7e165a10f4c61cfba91c779e6afd19d (patch)
tree2b5d74e2d07357b16446bcd4880b2e18a26a0b38
parent13b3d13b813ab834fac67dc05f8b86dbcc29c134 (diff)
downloadop-kernel-dev-cec15488c7e165a10f4c61cfba91c779e6afd19d.zip
op-kernel-dev-cec15488c7e165a10f4c61cfba91c779e6afd19d.tar.gz
powerpc: Pull out ksp_vsid logic into a helper
The previous patch left a bit of a wart in copy_process(). Clean it up a bit by moving the logic out into a helper. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
-rw-r--r--arch/powerpc/kernel/process.c32
1 files changed, 18 insertions, 14 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index e39f388..9c34327 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1095,6 +1095,23 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
return 0;
}
+static void setup_ksp_vsid(struct task_struct *p, unsigned long sp)
+{
+#ifdef CONFIG_PPC_STD_MMU_64
+ unsigned long sp_vsid;
+ unsigned long llp = mmu_psize_defs[mmu_linear_psize].sllp;
+
+ if (mmu_has_feature(MMU_FTR_1T_SEGMENT))
+ sp_vsid = get_kernel_vsid(sp, MMU_SEGSIZE_1T)
+ << SLB_VSID_SHIFT_1T;
+ else
+ sp_vsid = get_kernel_vsid(sp, MMU_SEGSIZE_256M)
+ << SLB_VSID_SHIFT;
+ sp_vsid |= SLB_VSID_KERNEL | llp;
+ p->thread.ksp_vsid = sp_vsid;
+#endif
+}
+
/*
* Copy a thread..
*/
@@ -1174,21 +1191,8 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
p->thread.vr_save_area = NULL;
#endif
-#ifdef CONFIG_PPC_STD_MMU_64
- {
- unsigned long sp_vsid;
- unsigned long llp = mmu_psize_defs[mmu_linear_psize].sllp;
+ setup_ksp_vsid(p, sp);
- if (mmu_has_feature(MMU_FTR_1T_SEGMENT))
- sp_vsid = get_kernel_vsid(sp, MMU_SEGSIZE_1T)
- << SLB_VSID_SHIFT_1T;
- else
- sp_vsid = get_kernel_vsid(sp, MMU_SEGSIZE_256M)
- << SLB_VSID_SHIFT;
- sp_vsid |= SLB_VSID_KERNEL | llp;
- p->thread.ksp_vsid = sp_vsid;
- }
-#endif /* CONFIG_PPC_STD_MMU_64 */
#ifdef CONFIG_PPC64
if (cpu_has_feature(CPU_FTR_DSCR)) {
p->thread.dscr_inherit = current->thread.dscr_inherit;
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