On Fri, Mar 29, 2019 at 01:07:07PM +, George Spelvin wrote:
> (Cross-posted in case there are generic issues; please trim if
> discussion wanders into single-architecture details.)
>
> I was working on some scaling code that can benefit from 64x64->128-bit
> multiplies. GCC supports an __int1
On Mon, Mar 25, 2019 at 03:47:37PM +0100, Arnd Bergmann wrote:
> Add the io_uring and pidfd_send_signal system calls to all architectures.
>
> These system calls are designed to handle both native and compat tasks,
> so all entries are the same across architectures, only arm-compat and
> the gener
On 3/30/2019 11:24 AM, Yue Haibing wrote:
From: YueHaibing
Fixes gcc '-Wunused-but-set-variable' warning:
drivers/crypto/nx/nx-842.c: In function 'decompress':
drivers/crypto/nx/nx-842.c:356:25: warning: variable 'dpadding' set but not
used [-Wunused-but-set-variable]
drivers/crypto/nx/nx-8
On Sat, 30 Mar 2019 at 09:43:47 +0100, Heiko Carstens wrote:
> It hasn't been enabled on s390 simply because at least I wasn't aware
> of this config option. Feel free to send a patch, otherwise I will
> enable this. Whatever you prefer.
>
> Thanks for pointing this out!
Here's a draft patch, but
General update:
I've since found the reason for the GCC version check.
It's not *broken* support (apologies for impugning GCC),
but *inefficient* support via a muditi3 helper function.
The version check is the version which added in-line code generation.
For example, s390 support was added in Mar
I've been tracking down when "umulditi3" support was added to various
gcc platforms. So far, I've found:
ia64: 2005-07-28, gcc 4.1.0
https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=102463
mips: 2008-06-09, gcc 4.4.0
https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=136600
alpha: 20
On Fri, Mar 29, 2019 at 10:42 PM Aneesh Kumar K.V
wrote:
>
> This move the dependency to DEV_DAX_PMEM_COMPAT such that only
> if DEV_DAX_PMEM is built as module we can allow the compat support.
>
> This allows to test the new code easily in a emulation setup where we
> often build things without m
Great work; that is indeed a logical follow-on.
Reviewed by: George Spelvin
I you feel even more ambitious, you could try impementing Rasmus
Villemoes' idea of having generic *compare* functions. (It's on
my to-do list, but I haven't made meaningful progress yet, and I'm
happy to pawn it off.)
On Sat, Mar 30, 2019 at 6:39 PM Andrey Abramov wrote:
>
> This is the logical continuation of sort improvements by George Spelvin
> "lib/sort & lib/list_sort: faster and smaller" series
> (added to the linux-next really recently).
>
> Patches from 1 to 4 replace simple swap functions with the buil
On Sat, Mar 30, 2019 at 07:43:53PM +0300, Andrey Abramov wrote:
> Replace int type with size_t type of the size argument
> in the swap function, also affect all its dependencies.
This says _what_ the patch does, but it gives no clue as to _why_ you
are doing this. Neither did your 0/5 patch :(
W
On Sat, Mar 30, 2019 at 09:00:15AM +1300, Michael Cree wrote:
> It does move the umulh inside the loop but that seems sensible since
> the use of unlikely() implies that the loop is unlikely to be taken
> so on average it would be a good bet to start the calculation of
> umulh earlier since it has
On Sat, Mar 30, 2019 at 11:28:21AM +, George Spelvin wrote:
> >> I like that the MIPS code leaves the high half of the product in
> >> the hi register until it tests the low half; I wish PowerPC would
> >> similarly move the mulhdu *after* the loop,
>
> > The MIPS code has the multiplication i
On Sat, Mar 30, 2019 at 10:30:23AM +, George Spelvin wrote:
> For s390, that was added on 24 March 2017 by
> https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=246457
> which is part of GCC 7.
>
> It also only applies to TARGET_ARCH12, which I am guessing
> corresponds to HAVE_MARCH_ZEC12_
Replace swap_dirty_idx function with built-in one,
because swap_dirty_idx does only a simple byte to byte swap.
Signed-off-by: Andrey Abramov
---
fs/ubifs/find.c | 9 +
1 file changed, 1 insertion(+), 8 deletions(-)
diff --git a/fs/ubifs/find.c b/fs/ubifs/find.c
index f9646835b026..5dea
Replace int type with size_t type of the size argument
in the swap function, also affect all its dependencies.
Signed-off-by: Andrey Abramov
---
arch/x86/kernel/unwind_orc.c | 2 +-
include/linux/sort.h | 2 +-
kernel/jump_label.c | 2 +-
lib/extable.c| 2 +-
lib
This is the logical continuation of sort improvements by George Spelvin
"lib/sort & lib/list_sort: faster and smaller" series
(added to the linux-next really recently).
Patches from 1 to 4 replace simple swap functions with the built-in
(which is now much faster) and grouped by subsystem (after th
Replace relaswap with built-in one, because of relaswap
does a simple byte to byte swap.
Signed-off-by: Andrey Abramov
---
arch/powerpc/kernel/module_32.c | 17 +
arch/powerpc/kernel/module_64.c | 17 +
2 files changed, 2 insertions(+), 32 deletions(-)
diff --git
Replace swap_eh_frame_hdr_table_entries with built-in one, because
swap_eh_frame_hdr_table_entries does a simple byte to byte swap.
Signed-off-by: Andrey Abramov
---
arch/arc/kernel/unwind.c | 20 ++--
1 file changed, 2 insertions(+), 18 deletions(-)
diff --git a/arch/arc/kernel
Replace dx_leaf_sort_swap, swap_refcount_rec and swap_xe functions
with built-in one, because they do only a simple byte to byte swap.
Signed-off-by: Andrey Abramov
---
fs/ocfs2/dir.c | 13 +
fs/ocfs2/refcounttree.c | 13 +++--
fs/ocfs2/xattr.c| 15 +++---
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