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 V4 04/14] powerpc/mm: Remove redundant TASK_SIZE_USER64 checks
Date: Thu, 16 Mar 2017 16:07:03 +0530 [thread overview]
Message-ID: <1489660633-24125-5-git-send-email-aneesh.kumar@linux.vnet.ibm.com> (raw)
In-Reply-To: <1489660633-24125-1-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 ac0c7ee60de0..af660f2b2ae3 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:[~2017-03-16 10:37 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-16 10:36 [PATCH V4 00/14] powerpc/mm/ppc64: Add 128TB support Aneesh Kumar K.V
2017-03-16 10:37 ` [PATCH V4 01/14] powerpc/mm/slice: Convert slice_mask high slice to a bitmap Aneesh Kumar K.V
2017-03-16 10:37 ` [PATCH V4 02/14] powerpc/mm/slice: Update the function prototype Aneesh Kumar K.V
2017-03-16 10:37 ` [PATCH V4 03/14] powerpc/mm: Move copy_mm_to_paca to paca.c Aneesh Kumar K.V
2017-03-16 10:37 ` Aneesh Kumar K.V [this message]
2017-03-16 10:37 ` [PATCH V4 05/14] powerpc/mm/slice: Move slice_mask struct definition to slice.c Aneesh Kumar K.V
2017-03-16 10:37 ` [PATCH V4 06/14] powerpc/mm/slice: Update slice mask printing to use bitmap printing Aneesh Kumar K.V
2017-03-16 10:37 ` [PATCH V4 07/14] powerpc/mm/hash: Move kernel context to the starting of context range Aneesh Kumar K.V
2017-03-16 10:37 ` [PATCH V4 08/14] powerpc/mm/hash: Support 68 bit VA Aneesh Kumar K.V
2017-03-16 10:37 ` [PATCH V4 09/14] powerpc/mm/hash: VSID 0 is no more an invalid VSID Aneesh Kumar K.V
2017-03-16 10:37 ` [PATCH V4 10/14] powerpc/mm/hash: Convert mask to unsigned long Aneesh Kumar K.V
2017-03-16 10:37 ` [PATCH V4 11/14] powerpc/mm/hash: Increase VA range to 128TB Aneesh Kumar K.V
2017-03-16 10:37 ` [PATCH V4 12/14] powerpc/mm/slice: Use mm task_size as max value of slice index Aneesh Kumar K.V
2017-03-16 10:37 ` [PATCH V4 13/14] powerpc/mm/hash64: Store task size in PACA Aneesh Kumar K.V
2017-03-16 10:37 ` [PATCH V4 14/14] powerpc/mm/hash: Skip using reserved virtual address range Aneesh Kumar K.V
2017-03-16 10:58 ` [PATCH updated] " Aneesh Kumar K.V
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1489660633-24125-5-git-send-email-aneesh.kumar@linux.vnet.ibm.com \
--to=aneesh.kumar@linux.vnet.ibm.com \
--cc=benh@kernel.crashing.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mpe@ellerman.id.au \
--cc=paulus@samba.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).