From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au
Cc: linuxppc-dev@lists.ozlabs.org,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: [PATCH V5 04/17] powerpc/mm: Remove redundant TASK_SIZE_USER64 checks
Date: Wed, 22 Mar 2017 09:06:50 +0530 [thread overview]
Message-ID: <1490153823-29241-5-git-send-email-aneesh.kumar@linux.vnet.ibm.com> (raw)
In-Reply-To: <1490153823-29241-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
The check against VSID range is implied when we check task size against
hash and radix pgtable range[1], because we make sure page table range cannot
exceed vsid range.
[1] BUILD_BUG_ON(TASK_SIZE_USER64 > H_PGTABLE_RANGE);
BUILD_BUG_ON(TASK_SIZE_USER64 > RADIX_PGTABLE_RANGE);
The check for smaller task size is also removed here, because the follow up
patch will support a tasksize smaller than pgtable range.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
arch/powerpc/mm/init_64.c | 4 ----
arch/powerpc/mm/pgtable_64.c | 5 -----
2 files changed, 9 deletions(-)
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index 9be992083d2a..8f6f2a173e47 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -71,10 +71,6 @@
#if H_PGTABLE_RANGE > USER_VSID_RANGE
#warning Limited user VSID range means pagetable space is wasted
#endif
-
-#if (TASK_SIZE_USER64 < H_PGTABLE_RANGE) && (TASK_SIZE_USER64 < USER_VSID_RANGE)
-#warning TASK_SIZE is smaller than it needs to be.
-#endif
#endif /* CONFIG_PPC_STD_MMU_64 */
phys_addr_t memstart_addr = ~0;
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index db93cf747a03..3e0cfb6420dd 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -56,11 +56,6 @@
#include "mmu_decl.h"
-#ifdef CONFIG_PPC_STD_MMU_64
-#if TASK_SIZE_USER64 > (1UL << (ESID_BITS + SID_SHIFT))
-#error TASK_SIZE_USER64 exceeds user VSID range
-#endif
-#endif
#ifdef CONFIG_PPC_BOOK3S_64
/*
--
2.7.4
next prev parent reply other threads:[~2017-03-22 3:37 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-22 3:36 [PATCH V5 00/17] powerpc/mm/ppc64: Add 128TB support Aneesh Kumar K.V
2017-03-22 3:36 ` [PATCH V5 01/17] powerpc/mm/slice: Convert slice_mask high slice to a bitmap Aneesh Kumar K.V
2017-03-29 3:11 ` Paul Mackerras
2017-03-29 5:20 ` Aneesh Kumar K.V
2017-03-22 3:36 ` [PATCH V5 02/17] powerpc/mm/slice: Update the function prototype Aneesh Kumar K.V
2017-03-29 3:43 ` Paul Mackerras
2017-03-29 10:48 ` Aneesh Kumar K.V
2017-03-22 3:36 ` [PATCH V5 03/17] powerpc/mm: Move copy_mm_to_paca to paca.c Aneesh Kumar K.V
2017-03-22 3:36 ` Aneesh Kumar K.V [this message]
2017-03-29 3:34 ` [PATCH V5 04/17] powerpc/mm: Remove redundant TASK_SIZE_USER64 checks Michael Ellerman
2017-03-22 3:36 ` [PATCH V5 05/17] powerpc/mm/slice: Move slice_mask struct definition to slice.c Aneesh Kumar K.V
2017-03-22 3:36 ` [PATCH V5 06/17] powerpc/mm/slice: Update slice mask printing to use bitmap printing Aneesh Kumar K.V
2017-03-22 3:36 ` [PATCH V5 07/17] powerpc/mm/hash: Move kernel context to the starting of context range Aneesh Kumar K.V
2017-03-22 3:36 ` [PATCH V5 08/17] powerpc/mm/hash: Support 68 bit VA Aneesh Kumar K.V
2017-03-22 3:36 ` [PATCH V5 09/17] powerpc/mm/hash: VSID 0 is no more an invalid VSID Aneesh Kumar K.V
2017-03-22 3:36 ` [PATCH V5 10/17] powerpc/mm/hash: Convert mask to unsigned long Aneesh Kumar K.V
2017-03-22 3:36 ` [PATCH V5 11/17] powerpc/mm/hash: Increase VA range to 128TB Aneesh Kumar K.V
2017-03-22 3:36 ` [PATCH V5 12/17] powerpc/mm/slice: Use mm task_size as max value of slice index Aneesh Kumar K.V
2017-03-22 3:36 ` [PATCH V5 13/17] powerpc/mm/hash: Store task size in PACA Aneesh Kumar K.V
2017-03-22 3:37 ` [PATCH V5 14/17] powerpc/mm/hash: Skip using reserved virtual address range Aneesh Kumar K.V
2017-03-22 3:37 ` [PATCH V5 15/17] powerpc/mm: Switch TASK_SIZE check to use mm->task_size Aneesh Kumar K.V
2017-03-22 3:37 ` [PATCH V5 16/17] mm: Let arch choose the initial value of task size Aneesh Kumar K.V
2017-03-28 11:17 ` Michael Ellerman
2017-03-28 15:22 ` Aneesh Kumar K.V
2017-03-29 9:20 ` Anshuman Khandual
2017-03-30 3:03 ` Anshuman Khandual
2017-03-22 3:37 ` [PATCH V5 17/17] powerpc/mm: Enable mappings above 128TB Aneesh Kumar K.V
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