> -Original Message-
> From: Andrew Morton [mailto:a...@linux-foundation.org]
> Sent: Thursday, March 19, 2015 6:08 AM
> To: Wang, Yalin
> Cc: 'David Rientjes'; 'heiko.carst...@de.ibm.com'; 't...@linutronix.de';
> 'linux-kernel@vger.k
This patch change /proc/stat to show each cpu,
we show each present cpus instead of eacn online cpu,
because some cpus are online / offline dynamically,
we should also show its cputime even it is offline,
some lib will read this file to detect cpu numbers,
we should also return the real present cpu
> -Original Message-
> From: David Rientjes [mailto:rient...@google.com]
> Sent: Wednesday, March 18, 2015 7:02 AM
> To: Wang, Yalin
> Cc: a...@linux-foundation.org; heiko.carst...@de.ibm.com;
> t...@linutronix.de; linux-kernel@vger.kernel.org
> Subject: Re: [RFC] pr
This patch change /proc/stat to show each cpu,
we show each present cpus instead of eacn online cpu,
because some cpus are online / offline dynamically,
we should also show its cputime even it is offline,
some lib will read this file to detect cpu numbers,
we should also return the real present cpu
In reclaim path, if encounter a freeable page,
the try_to_unmap may fail, because the page's pte is
dirty, we can recheck this page as normal non-freeable page,
this means we can swap out this page into swap partition.
Signed-off-by: Yalin Wang
---
mm/vmscan.c | 5 +
1 file changed, 5 insert
Hi
I just want to explain my ideas about file map pages for madvise_free() syscall.
As the following patch,
For file map vma, there is 2 types:
1. private file map
In this type, the pages of this vma are file map pages or anon page
(when COW happened),
2. shared file map
In this t
> -Original Message-
> From: Minchan Kim [mailto:minc...@kernel.org]
> Sent: Wednesday, March 11, 2015 9:21 AM
> To: Andrew Morton
> Cc: linux-kernel@vger.kernel.org; linux...@kvack.org; Michal Hocko;
> Johannes Weiner; Mel Gorman; Rik van Riel; Shaohua Li; Wang, Ya
> -Original Message-
> From: Minchan Kim [mailto:minchan@gmail.com] On Behalf Of Minchan Kim
> Sent: Tuesday, March 03, 2015 12:15 PM
> To: Wang, Yalin
> Cc: 'Michal Hocko'; 'Andrew Morton'; 'linux-kernel@vger.kernel.org';
> 'linux..
> -Original Message-
> From: Minchan Kim [mailto:minchan@gmail.com] On Behalf Of Minchan Kim
> Sent: Tuesday, March 03, 2015 11:26 AM
> To: Wang, Yalin
> Cc: 'Michal Hocko'; 'Andrew Morton'; 'linux-kernel@vger.kernel.org';
> 'linux..
This patch add ClearPageDirty() to clear AnonPage dirty flag,
if not clear page dirty for this anon page, the page will never be
treated as freeable. We also make sure the shared AnonPage is not
freeable, we implement it by dirty all copyed AnonPage pte,
so that make sure the Anonpage will not beco
> -Original Message-
> From: Minchan Kim [mailto:minchan@gmail.com] On Behalf Of Minchan Kim
> Sent: Saturday, February 28, 2015 9:50 PM
> To: Wang, Yalin
> Cc: Michal Hocko; Andrew Morton; linux-kernel@vger.kernel.org; linux-
> m...@kvack.org; Rik van Riel; Johannes
> -Original Message-
> From: Minchan Kim [mailto:minchan@gmail.com] On Behalf Of Minchan Kim
> Sent: Saturday, February 28, 2015 9:56 PM
> To: Wang, Yalin
> Cc: 'Michal Hocko'; Andrew Morton; linux-kernel@vger.kernel.org; linux-
> m...@kvack.org; Rik va
This patch add ClearPageDirty() to clear AnonPage dirty flag,
if not clear page dirty for this anon page, the page will never be
treated as freeable. we also make sure the shared AnonPage is not
freeable, we implement it by dirty all copyed AnonPage pte,
so that make sure the Anonpage will not beco
> -Original Message-
> From: Michal Hocko [mailto:msts...@gmail.com] On Behalf Of Michal Hocko
> Sent: Saturday, February 28, 2015 5:03 AM
> To: Wang, Yalin
> Cc: 'Minchan Kim'; Andrew Morton; linux-kernel@vger.kernel.org; linux-
> m...@kvack.org; Rik van Riel;
> -Original Message-
> From: Minchan Kim [mailto:minchan@gmail.com] On Behalf Of Minchan Kim
> Sent: Friday, February 27, 2015 2:44 PM
> To: Wang, Yalin
> Cc: Michal Hocko; Andrew Morton; linux-kernel@vger.kernel.org; linux-
> m...@kvack.org; Rik van Riel; Johannes
> -Original Message-
> From: Minchan Kim [mailto:minchan@gmail.com] On Behalf Of Minchan Kim
> Sent: Friday, February 27, 2015 1:28 PM
> To: Wang, Yalin
> Cc: Michal Hocko; Andrew Morton; linux-kernel@vger.kernel.org; linux-
> m...@kvack.org; Rik van Riel; Johannes
This patch add ClearPageDirty() to clear AnonPage dirty flag,
the Anonpage mapcount must be 1, so that this page is only used by
the current process, not shared by other process like fork().
if not clear page dirty for this anon page, the page will never be
treated as freeable.
Signed-off-by: Yali
Test bit before clear close_on_exec and open_fds,
by trace __clear_bit(), these 2 place are false in most times,
we test it so that we don't need clear_bit, and we can win
in most time.
Add *_if_need bitop non-atomic version.
Signed-off-by: Yalin Wang
---
fs/file.c
add test_bit() before clear close_on_exec and open_fds,
by trace __clear_bit(), these 2 place are false in most times,
we test it so that we don't need clear_bit, and we can win
in most time.
Signed-off-by: Yalin Wang
---
fs/file.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff
add test_bit() before clear close_on_exec and open_fds,
by trace __clear_bit(), these 2 place are false in most times,
we test it so that we don't need dirty cacheline, and we can win
in most time.
Signed-off-by: Yalin Wang
---
fs/file.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
> -Original Message-
> From: Andrew Morton [mailto:a...@linux-foundation.org]
> Sent: Tuesday, February 10, 2015 4:34 AM
> To: Wang, Yalin
> Cc: 'Kirill A. Shutemov'; 'a...@arndb.de'; 'linux-a...@vger.kernel.org';
> 'linux-kernel@v
> -Original Message-
> From: Andrew Morton [mailto:a...@linux-foundation.org]
> Sent: Tuesday, February 03, 2015 6:59 PM
> To: Wang, Yalin
> Cc: 'Kirill A. Shutemov'; 'a...@arndb.de'; 'linux-a...@vger.kernel.org';
> 'linux-kernel@v
> -Original Message-
> From: Rasmus Villemoes [mailto:li...@rasmusvillemoes.dk]
> Sent: Tuesday, February 03, 2015 5:34 PM
> To: Andrew Morton
> Cc: Wang, Yalin; 'Kirill A. Shutemov'; 'a...@arndb.de'; 'linux-
> a...@vger.kernel.
> -Original Message-
> From: Wang, Yalin
> Sent: Tuesday, February 03, 2015 3:04 PM
> To: 'Andrew Morton'
> Cc: 'Kirill A. Shutemov'; 'a...@arndb.de'; 'linux-a...@vger.kernel.org';
> 'linux-kernel@vger.kernel.org'
> -Original Message-
> From: Andrew Morton [mailto:a...@linux-foundation.org]
> Sent: Tuesday, February 03, 2015 2:39 PM
> To: Wang, Yalin
> Cc: 'Kirill A. Shutemov'; 'a...@arndb.de'; 'linux-a...@vger.kernel.org';
> 'linux-kernel@v
> -Original Message-
> From: Wang, Yalin
> Sent: Tuesday, February 03, 2015 10:13 AM
> To: 'Kirill A. Shutemov'; Andrew Morton
> Cc: 'a...@arndb.de'; 'linux-a...@vger.kernel.org'; 'linux-
> ker...@vger.kernel.org'; 'li
> -Original Message-
> From: Kirill A. Shutemov [mailto:kir...@shutemov.name]
> Sent: Tuesday, February 03, 2015 9:18 AM
> To: Andrew Morton
> Cc: Wang, Yalin; 'a...@arndb.de'; 'linux-a...@vger.kernel.org'; 'linux-
> ker...@vger.kernel.org&#x
This patch change non-atomic bitops,
add a if() condition to test it, before set/clear the bit.
so that we don't need dirty the cache line, if this bit
have been set or clear. On SMP system, dirty cache line will
need invalidate other processors cache line, this will have
some impact on SMP systems
> -Original Message-
> From: Naoya Horiguchi [mailto:n-horigu...@ah.jp.nec.com]
> Sent: Friday, January 30, 2015 4:24 PM
> To: Wang, Yalin
> Cc: 'a...@linux-foundation.org'; 'kirill.shute...@linux.intel.com';
> 'o...@redhat.com'; &#x
This patch change smaps/pagemap_read pagetable walk behavior, to make
sure not skip VM_PFNMAP pagetables,
so that we can calculate COW pages of VM_PFNMAP as normal pages.
Signed-off-by: Yalin Wang
---
fs/proc/task_mmu.c | 2 ++
include/linux/mm.h | 2 ++
mm/pagewalk.c | 5 +
3 files cha
This patch change smaps pagetable walk behavior, to make
sure not skip VM_PFNMAP pagetables,
so that we can calculate COW pages of VM_PFNMAP as normal pages.
Signed-off-by: Yalin Wang
---
fs/proc/task_mmu.c | 10 ++
1 file changed, 10 insertions(+)
diff --git a/fs/proc/task_mmu.c b/fs/p
> -Original Message-
> From: 'gre...@linuxfoundation.org' [mailto:gre...@linuxfoundation.org]
> Sent: Thursday, January 29, 2015 2:45 AM
> To: Wang, Yalin
> Cc: 'tranmanph...@gmail.com'; 'fabio.este...@freescale.com';
> 'prime.z...@hua
Change kmem_free to use kvfree() generic function,
remove the duplicated code.
Signed-off-by: Yalin Wang
---
fs/xfs/kmem.c | 10 --
fs/xfs/kmem.h | 5 -
2 files changed, 4 insertions(+), 11 deletions(-)
diff --git a/fs/xfs/kmem.c b/fs/xfs/kmem.c
index 53e95b2..a7a3a63 100644
--- a/
Change agp_free_page_array to use kvfree function,
remove the duplicated code.
Signed-off-by: Yalin Wang
---
drivers/char/agp/agp.h | 5 -
drivers/char/agp/generic.c | 11 ---
2 files changed, 4 insertions(+), 12 deletions(-)
diff --git a/drivers/char/agp/agp.h b/drivers/char/a
This patch change the error return value from -1 to -ENOMEM,
so that userspace can get the correct errno, otherwise,
-1 will be -EPERM, userspace will print permission deny for allocation
failure.
Signed-off-by: Yalin Wang
---
drivers/staging/android/ion/ion_cma_heap.c | 6 ++
1 file changed
> -Original Message-
> From: Rusty Russell [mailto:ru...@rustcorp.com.au]
> Sent: Tuesday, January 20, 2015 2:33 PM
> To: Wang, Yalin; 'a...@linux-foundation.org'; 'jani.nik...@intel.com';
> 'h...@infradead.org'; 'h...@suse.de'; &#
> -Original Message-
> From: Russell King - ARM Linux [mailto:li...@arm.linux.org.uk]
> Sent: Thursday, January 15, 2015 12:38 AM
> To: Wang, Yalin
> Cc: 'Ard Biesheuvel'; 'Will Deacon'; 'linux-kernel@vger.kernel.org';
> 'akinobu.m...@gm
This patch make sure to export module parameters even the permission
is zero, this is useful for some platforms like Android,
the init process can change the parameter mode/owner by
chmod/chown during bootup
Signed-off-by: Yalin Wang
---
kernel/params.c | 6 --
1 file changed, 6 deletions(-)
> -Original Message-
> From: Russell King - ARM Linux [mailto:li...@arm.linux.org.uk]
> Sent: Friday, January 09, 2015 7:11 PM
> To: Wang, Yalin
> Cc: 'Ard Biesheuvel'; 'Will Deacon'; 'linux-kernel@vger.kernel.org';
> 'akinob
> -Original Message-
> From: Russell King - ARM Linux [mailto:li...@arm.linux.org.uk]
> Sent: Friday, January 09, 2015 7:11 PM
> To: Wang, Yalin
> Cc: 'Ard Biesheuvel'; 'Will Deacon'; 'linux-kernel@vger.kernel.org';
> 'akinobu.m...@gm
> -Original Message-
> From: Russell King - ARM Linux [mailto:li...@arm.linux.org.uk]
> Sent: Thursday, January 08, 2015 7:42 PM
> To: Wang, Yalin
> Cc: 'ch...@printf.net'; 'ulf.hans...@linaro.org'; 'tim.kry...@gmail.com';
> 'tgih...
> -Original Message-
> From: Russell King - ARM Linux [mailto:li...@arm.linux.org.uk]
> Sent: Friday, January 09, 2015 2:41 AM
> To: Wang, Yalin
> Cc: 'Will Deacon'; 'Ard Biesheuvel'; 'linux-kernel@vger.kernel.org';
> 'akinobu.m...@gm
This patch fix the mmc driver suspend/resume conflict problems,
mmc workqueue will queue mmc_rescan(), and it will call some
pm_runtime_* functions, this will conflict with suspend path sometimes,
and will result in some strange behavior:
Suspend path:
-000 |context_switch(inline)
This patch fix the mmc driver suspend/resume conflict problems,
mmc workqueue will queue mmc_rescan(), and it will call some
pm_runtime_* functions, this will conflict with suspend path sometimes,
and will result in some strange behavior:
Suspend path:
-000 |context_switch(inline)
This patch subtract sharedram from cached,
sharedram can only be swap into swap partitions,
they should be treated as swap pages, not as cached pages.
Signed-off-by: Yalin Wang
---
fs/proc/meminfo.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/proc/meminfo.c b/fs/proc/m
> -Original Message-
> From: Minchan Kim [mailto:minc...@kernel.org]
> Sent: Friday, December 19, 2014 9:05 AM
> To: Wang, Yalin
> Cc: 'Konstantin Khlebnikov'; 'Kirill A. Shutemov'; 'Andrew Morton'; 'linux-
> ker...@vger
I notice this commit:
mm: support madvise(MADV_FREE),
it can free clean anonymous pages directly,
doesn't need pageout to swap partition,
but I found it doesn't work on my platform,
which don't enable any swap partitions.
I make a change for this.
Just to explain my issue clearly,
Do we need som
This patch move struct regmap.spinlock_flags into the union of
spinlock, so that we can shrink struct regmap size.
Signed-off-by: Yalin Wang
---
drivers/base/regmap/internal.h | 6 --
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/base/regmap/internal.h b/drivers/base/
Hi,
I am think of discard stack pages if the old
Page is under the stack pointer(Assume stack grow down)
of the task, This page don't need pageout, we can free it directly,
When the task need it again, we just use a zero page to
Map, it is safe for stack .
But I don't know how to implement it,
An
> -Original Message-
> From: Kirill A. Shutemov [mailto:kir...@shutemov.name]
> Sent: Wednesday, December 10, 2014 7:06 PM
> To: Wang, Yalin
> Cc: 'Andrew Morton'; 'Konstantin Khlebnikov'; 'linux-
> ker...@vger.kernel.org'; 'linux...
smaps_pte_entry() doesn't ignore zero_huge_page,
but it ignore zero_page, because vm_normal_page() will
ignore it. We remove vm_normal_page() call, because walk_page_range()
have ignore VM_PFNMAP vma maps, it's safe to just use pfn_valid(),
so that we can also consider zero_page to be a valid page.
This patch fix the build error when make like this:
make O=/xx/x vm
use $(OUTPUT) to generate to the right place.
Signed-off-by: Yalin Wang
---
tools/lib/api/Makefile | 2 +-
tools/vm/Makefile | 14 +-
2 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/tools/lib/a
This patch fix the build error when make like this:
make O=/xx/x vm
use $(OUTPUT) to generate to the right place.
Signed-off-by: Yalin Wang
---
tools/vm/Makefile | 10 ++
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/tools/vm/Makefile b/tools/vm/Makefile
index 3d907da..2
This patch fix the build error when make like this:
make O=/xx/x vm
use $(OUTPUT) to generate to the right place.
Signed-off-by: Yalin Wang
---
tools/vm/Makefile | 9 +
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/tools/vm/Makefile b/tools/vm/Makefile
index 3d907da..28d
This patch add KPF_ZERO_PAGE flag for zero_page,
so that userspace process can notice zero_page from
/proc/kpageflags, and then do memory analysis more accurately.
Signed-off-by: Yalin Wang
---
Documentation/vm/pagemap.txt | 8
fs/proc/page.c | 16
This patch add VM_BUG_ON_PAGE() for slab page,
because _mapcount is an union with slab struct in struct page,
avoid access _mapcount if this page is a slab page.
Also remove the unneeded bracket.
Signed-off-by: Yalin Wang
---
include/linux/mm.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletio
This patch add VM_BUG_ON_PAGE() for slab page,
because _mapcount is an union with slab struct in struct page,
avoid access _mapcount if this page is a slab page.
Also remove the unneeded bracket.
Signed-off-by: Yalin Wang
---
include/linux/mm.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletio
> -Original Message-
> From: Hillf Danton [mailto:hillf...@alibaba-inc.com]
> Sent: Monday, December 08, 2014 5:33 PM
> To: Wang, Yalin
> Cc: linux-kernel; linux...@kvack.org; linux-arm-ker...@lists.infradead.org;
> Andrew Morton; Hillf Danton
> Subject: Re: [PATCH] m
This patch add VM_BUG_ON() for slab page,
because _mapcount is an union with slab struct in struct page,
avoid access _mapcount if this page is a slab page.
Also remove the unneeded bracket.
Signed-off-by: Yalin Wang
---
include/linux/mm.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
This patch add KPF_ZERO_PAGE flag for zero_page,
so that userspace process can notice zero_page from
/proc/kpageflags, and then do memory analysis more accurately.
Signed-off-by: Yalin Wang
---
Documentation/vm/pagemap.txt | 5 +
fs/proc/page.c | 16 +++
This patch add KPF_ZERO_PAGE flag for zero_page,
so that userspace process can notice zero_page from
/proc/kpageflags, and then do memory analysis more accurately.
Signed-off-by: Yalin Wang
---
fs/proc/page.c | 16 +---
include/linux/huge_mm.h|
> -Original Message-
> From: Konstantin Khlebnikov [mailto:koc...@gmail.com]
> Sent: Friday, December 05, 2014 5:21 PM
> To: Wang, Yalin
> Cc: linux-kernel@vger.kernel.org; linux...@kvack.org; linux-arm-
> ker...@lists.infradead.org; a...@linux-foundation.org; n-
> ho
This patch add KPF_ZERO_PAGE flag for zero_page,
so that userspace process can notice zero_page from
/proc/kpageflags, and then do memory analysis more accurately.
Signed-off-by: Yalin Wang
---
fs/proc/page.c | 14 +++---
include/linux/huge_mm.h| 1
This patch add KPF_ZERO_PAGE flag for zero_page,
so that userspace process can notice zero_page from
/proc/kpageflags, and then do memory analysis more accurately.
Signed-off-by: Yalin Wang
---
fs/proc/page.c | 3 +++
include/uapi/linux/kernel-page-flags.h | 1 +
2 files
> -Original Message-
> From: Konstantin Khlebnikov [mailto:koc...@gmail.com]
> Sent: Friday, December 05, 2014 2:39 PM
> To: Kirill A. Shutemov
> Cc: Wang, Yalin; linux-kernel@vger.kernel.org; linux...@kvack.org; linux-
> arm-ker...@lists.infradead.org
> Subject
> -Original Message-
> From: glik...@secretlab.ca [mailto:glik...@secretlab.ca] On Behalf Of Grant
> Likely
> Sent: Thursday, December 04, 2014 8:46 PM
> To: Wang, Yalin
> Cc: robh...@kernel.org; devicet...@vger.kernel.org; pawel.m...@arm.com;
> mark.rutl...
> -Original Message-
> From: Catalin Marinas [mailto:catalin.mari...@arm.com]
> Sent: Thursday, December 04, 2014 8:03 PM
> To: Russell King - ARM Linux
> Cc: Wang, Yalin; 'linux...@kvack.org'; Will Deacon; 'linux-
> ker...@vger.kernel.org'; 'li
> -Original Message-
> From: Grant Likely [mailto:glik...@secretlab.ca] On Behalf Of Grant Likely
> Sent: Thursday, December 04, 2014 6:05 PM
> To: Wang, Yalin; 'robh...@kernel.org'; 'devicet...@vger.kernel.org';
> 'pawel.m...@arm.com&
> -Original Message-
> From: Grant Likely [mailto:glik...@secretlab.ca] On Behalf Of Grant Likely
> Sent: Wednesday, September 24, 2014 10:45 PM
> To: Wang, Yalin; 'robh...@kernel.org'; 'devicet...@vger.kernel.org';
> 'pawel.m...@arm.com&
> -Original Message-
> From: Kirill A. Shutemov [mailto:kir...@shutemov.name]
> Sent: Tuesday, December 02, 2014 7:30 PM
> To: Wang, Yalin
> Cc: 'linux-kernel@vger.kernel.org'; 'linux...@kvack.org'; 'linux-arm-
> ker...@lists.infradead.or
This patch add/dec zero_page's _mapcount to make sure
the mapcount is correct for zero_page,
so that when read from /proc/kpagecount, zero_page's
mapcount is also correct, userspace process like procrank can
calculate PSS correctly.
Signed-off-by: Yalin Wang
---
mm/memory.c | 2 ++
1 file change
This patch add/dec zero_page's _mapcount to make sure
the mapcount is correct for zero_page,
so that when read from /proc/kpagecount, zero_page's
mapcount is also correct, userspace process like procrank can
calculate PSS correctly.
Signed-off-by: Yalin Wang
---
mm/memory.c | 2 ++
1 file change
> From: Russell King - ARM Linux [mailto:li...@arm.linux.org.uk]
> Sent: Friday, November 14, 2014 5:58 PM
> To: Wang, Yalin
> Cc: 'Will Deacon'; 'Ard Biesheuvel'; 'linux-kernel@vger.kernel.org';
> 'akinobu.m...@gmail.com';
> From: Joe Perches [mailto:j...@perches.com]
> Sent: Friday, November 14, 2014 1:33 PM
> To: Wang, Yalin
> Cc: 'chunk...@googlemail.com'; 'linvi...@tuxdriver.com'; 'linux-
> wirel...@vger.kernel.org'; 'net...@vger.kernel.org'; 'linu
Use the inline function instead of directly indexing the array.
This allows some architectures with hardware instructions for bit
reversals to eliminate the array.
Signed-off-by: Joe Perches
Signed-off-by: Yalin Wang
---
drivers/net/wireless/ath/carl9170/phy.c | 4 ++--
1 file changed, 2 inser
Use the inline function instead of directly indexing the array.
This allows some architectures with hardware instructions for bit
reversals to eliminate the array.
Signed-off-by: Joe Perches
Signed-off-by: Yalin Wang
---
sound/usb/6fire/firmware.c | 2 +-
1 file changed, 1 insertion(+), 1 dele
> -Original Message-
> From: Russell King - ARM Linux [mailto:li...@arm.linux.org.uk]
> Sent: Friday, November 14, 2014 7:53 AM
> To: Wang, Yalin
> > On Fri, Oct 31, 2014 at 01:42:44PM +0800, Wang, Yalin wrote:
> > This patch add bitrev.h file to support rbit
> From: Will Deacon [mailto:will.dea...@arm.com]
> >
> > If this is the case, I suggest you update patch 8187/1 to retain the
> > byte_rev_table symbol, even in the accelerated case, and remove it
> > with a followup patch once Joe's patches have landed upstream. Also, a
> > link to the patches wou
> From: Will Deacon [mailto:will.dea...@arm.com]
> > +#ifndef __ASM_ARM64_BITREV_H
> > +#define __ASM_ARM64_BITREV_H
>
> Really minor nit, but we don't tend to include 'ARM64' in our header guards,
> so this should just be __ASM_BITREV_H.
>
> With that change,
>
> Acked-by: Will Deacon
>
I h
This patch remove clear_thread_flag(TIF_UPROBE) in do_work_pending(),
because uprobe_notify_resume() have do this.
Signed-off-by: Yalin Wang
---
arch/arm/kernel/signal.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index bd19834..8aa6f1b
> From: Joe Perches [mailto:j...@perches.com]
> > > > @@ -591,10 +591,9 @@ do_work_pending(struct pt_regs *regs, unsigned
> int
> > > thread_flags, int syscall)
> > > > return restart;
> > > > }
> > > >
> From: Wang, Yalin
> Subject: [RFC V6 2/3] add CONFIG_HAVE_ARCH_BITREVERSE to support rbit
> instruction
>
> This patch add bitrev.h file to support rbit instruction, so that we can do
> bitrev operation by hardware.
> Signed-off-by: Yalin Wang
> ---
> arch/ar
> From: Joe Perches [mailto:j...@perches.com]
> > diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
> []
> > @@ -591,10 +591,9 @@ do_work_pending(struct pt_regs *regs, unsigned int
> thread_flags, int syscall)
> > return restart;
> >
This patch remove clear_thread_flag(TIF_UPROBE) in do_work_pending(),
because uprobe_notify_resume() have do this.
Signed-off-by: Yalin Wang
---
arch/arm/kernel/signal.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
i
This patch add bitrev.h file to support rbit instruction,
so that we can do bitrev operation by hardware.
Signed-off-by: Yalin Wang
---
arch/arm/Kconfig | 1 +
arch/arm/include/asm/bitrev.h | 21 +
2 files changed, 22 insertions(+)
create mode 100644 arch/arm/in
This patch add bitrev.h file to support rbit instruction,
so that we can do bitrev operation by hardware.
Signed-off-by: Yalin Wang
---
arch/arm64/Kconfig | 1 +
arch/arm64/include/asm/bitrev.h | 21 +
2 files changed, 22 insertions(+)
create mode 100644 arch/ar
This patch add bitrev.h file to support rbit instruction,
so that we can do bitrev operation by hardware.
Signed-off-by: Yalin Wang
---
arch/arm/Kconfig | 1 +
arch/arm/include/asm/bitrev.h | 21 +
2 files changed, 22 insertions(+)
create mode 100644 arch/arm/in
this change add CONFIG_HAVE_ARCH_BITREVERSE config option,
so that we can use some architecture's bitrev hardware instruction
to do bitrev operation.
Introduce __constant_bitrev* macro for constant bitrev operation.
Change __bitrev16() __bitrev32() to be inline function,
don't need export symbol
> From: Will Deacon [mailto:will.dea...@arm.com]
> Sent: Thursday, October 30, 2014 8:01 PM
> To: Wang, Yalin
> Cc: 'Rob Herring'; 'Joe Perches'; 'Russell King - ARM Linux'; 'linux-
> ker...@vger.kernel.org'; 'akinobu.m...@gmail.com
This patch add bitrev.h file to support rbit instruction,
so that we can do bitrev operation by hardware.
Signed-off-by: Yalin Wang
---
arch/arm64/Kconfig | 1 +
arch/arm64/include/asm/bitrev.h | 28
2 files changed, 29 insertions(+)
create mode 100644
This patch add bitrev.h file to support rbit instruction,
so that we can do bitrev operation by hardware.
Signed-off-by: Yalin Wang
---
arch/arm/Kconfig | 1 +
arch/arm/include/asm/bitrev.h | 28
2 files changed, 29 insertions(+)
create mode 100644 arch
this change add CONFIG_HAVE_ARCH_BITREVERSE config option,
so that we can use arm/arm64 rbit instruction to do bitrev operation
by hardware.
Change bitrev16() bitrev32() to be inline function,
don't need export symbol for these tiny functions.
Signed-off-by: Yalin Wang
---
include/linux/bitrev.
> From: Joe Perches [mailto:j...@perches.com]
> > We also change byte_rev_table[] to be static, to make sure no drivers
> > can access it directly.
>
> You break the build with this patch.
>
> You can't do this until the users of the table are converted.
>
> So far, they are not.
>
> I submitte
> From: Rob Herring [mailto:robherri...@gmail.com]
> >> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index
> >> 9532f8d..263c28c 100644
> >> --- a/arch/arm64/Kconfig
> >> +++ b/arch/arm64/Kconfig
> >> @@ -36,6 +36,7 @@ config ARM64
> >> select HARDIRQS_SW_RESEND
> >> select HAVE
This patch add bitrev.h file to support rbit instruction,
so that we can do bitrev operation by hardware.
Signed-off-by: Yalin Wang
---
arch/arm64/Kconfig | 1 +
arch/arm64/include/asm/bitrev.h | 28
2 files changed, 29 insertions(+)
create mode 100644
This patch add bitrev.h file to support rbit instruction,
so that we can do bitrev operation by hardware.
Signed-off-by: Yalin Wang
---
arch/arm/Kconfig | 1 +
arch/arm/include/asm/bitrev.h | 28
2 files changed, 29 insertions(+)
create mode 100644 arch
this change add CONFIG_HAVE_ARCH_BITREVERSE config option,
so that we can use arm/arm64 rbit instruction to do bitrev operation
by hardware.
We also change byte_rev_table[] to be static,
to make sure no drivers can access it directly.
Change bitrev16() bitrev32() to be inline function,
don't need
> From: Joe Perches [mailto:j...@perches.com]
> > I think the most safe way is change byte_rev_table[] to be satic, So
> > that no driver can access it directly, The build error can remind the
> > developer if they use byte_rev_table[] Directly .
>
> You can do that with your later patch, but the
> From: Will Deacon [mailto:will.dea...@arm.com]
> Yup, sorry, I didn't realise this patch covered both architectures. It
> would probably be a good idea to split it into 3 parts: a core part, then
> the two architectural bits.
>
> Will
Ok ,
I will split the patch into three parts,
And send again
> On Mon, 2014-10-27 at 14:37 +0800, Wang, Yalin wrote:
> > > this change add CONFIG_HAVE_ARCH_BITREVERSE config option, so that
> > > we can use arm/arm64 rbit instruction to do bitrev operation by
> > > hardware.
> []
> > > diff --git a/include/linux/
1 - 100 of 179 matches
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