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| author | Michael Ellerman | 2014-07-10 04:29:21 +0200 |
|---|---|---|
| committer | Benjamin Herrenschmidt | 2014-07-28 06:10:24 +0200 |
| commit | cec15488c7e165a10f4c61cfba91c779e6afd19d (patch) | |
| tree | 2b5d74e2d07357b16446bcd4880b2e18a26a0b38 /arch/powerpc/kernel | |
| parent | powerpc: Remove MMU_FTR_SLB (diff) | |
| download | kernel-qcow2-linux-cec15488c7e165a10f4c61cfba91c779e6afd19d.tar.gz kernel-qcow2-linux-cec15488c7e165a10f4c61cfba91c779e6afd19d.tar.xz kernel-qcow2-linux-cec15488c7e165a10f4c61cfba91c779e6afd19d.zip | |
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>
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/process.c | 32 |
1 files changed, 18 insertions, 14 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index e39f388fc25c..9c34327e38ca 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; |