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Tvrtko Ursulin bb670c31e1 drm/amdpgu: Micro-optimise amdgpu_ring_commit
For some value of optimisation we can replace the division with an
bitwise and. And it even shrinks the code. Before:

     6c9:       53                      push   %rbx
     6ca:       4c 8b 47 08             mov    0x8(%rdi),%r8
     6ce:       31 d2                   xor    %edx,%edx
     6d0:       48 89 fb                mov    %rdi,%rbx
     6d3:       8b 87 c8 05 00 00       mov    0x5c8(%rdi),%eax
     6d9:       41 8b 48 04             mov    0x4(%r8),%ecx
     6dd:       f7 d0                   not    %eax
     6df:       21 c8                   and    %ecx,%eax
     6e1:       83 c1 01                add    $0x1,%ecx
     6e4:       83 c0 01                add    $0x1,%eax
     6e7:       f7 f1                   div    %ecx
     6e9:       89 d6                   mov    %edx,%esi
     6eb:       41 ff 90 88 00 00 00    call   *0x88(%r8)

After:

     6c9:       53                      push   %rbx
     6ca:       48 8b 57 08             mov    0x8(%rdi),%rdx
     6ce:       48 89 fb                mov    %rdi,%rbx
     6d1:       8b 87 c8 05 00 00       mov    0x5c8(%rdi),%eax
     6d7:       8b 72 04                mov    0x4(%rdx),%esi
     6da:       f7 d0                   not    %eax
     6dc:       21 f0                   and    %esi,%eax
     6de:       83 c0 01                add    $0x1,%eax
     6e1:       21 c6                   and    %eax,%esi
     6e3:       ff 92 88 00 00 00       call   *0x88(%rdx)

Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Sunil Khatri <sunil.khatri@amd.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2024-08-06 11:10:40 -04:00
arch Linux 6.10-rc6 2024-07-05 10:47:28 +02:00
block block: unmap and free user mapped integrity via submitter 2024-06-12 11:00:50 -06:00
certs kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
crypto This push fixes a bug in the new ecc P521 code as well as a buggy 2024-05-20 08:47:54 -07:00
Documentation Documentation/amdgpu: Fix duplicate declaration 2024-07-16 11:45:22 -04:00
drivers drm/amdpgu: Micro-optimise amdgpu_ring_commit 2024-08-06 11:10:40 -04:00
fs Bug fixes for 6.10-rc6: 2024-06-29 09:21:40 -07:00
include drm/amdkfd: allow users to target recommended SDMA engines 2024-07-25 17:43:41 -04:00
init gcc: disable '-Warray-bounds' for gcc-9 2024-06-15 10:43:04 -07:00
io_uring io_uring: signal SQPOLL task_work with TWA_SIGNAL_NO_IPI 2024-06-24 19:46:15 -06:00
ipc Mainly singleton patches, documented in their respective changelogs. 2024-05-19 14:02:03 -07:00
kernel TTY/Serial/Console fixes for 6.10-rc6 2024-06-30 08:57:43 -07:00
lib Linux 6.10-rc6 2024-07-05 10:47:28 +02:00
LICENSES
mm mm/memory: don't require head page for do_set_pmd() 2024-06-24 20:52:11 -07:00
net NFS client bugfixes for Linux 6.10 2024-06-29 13:48:24 -07:00
rust rust: avoid unused import warning in rusttest 2024-06-11 23:33:28 +02:00
samples tracing/treewide: Remove second parameter of __assign_str() 2024-05-22 20:14:47 -04:00
scripts kbuild: scripts/gdb: bring the "abspath" back 2024-06-27 04:20:32 +09:00
security lsm/stable-6.10 PR 20240617 2024-06-17 18:35:12 -07:00
sound Linux 6.10-rc6 2024-07-05 10:47:28 +02:00
tools Fix three recent minor turbostat regressions. 2024-06-28 09:04:33 -07:00
usr kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
virt KVM fixes for 6.10 2024-06-21 08:03:55 -04:00
.clang-format
.cocciconfig
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap bpf-for-netdev 2024-06-14 17:57:10 -07:00
.rustfmt.toml
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS MAINTAINERS: fix Xinhui's name 2024-07-10 10:12:15 -04:00
Makefile Linux 6.10-rc6 2024-06-30 14:40:44 -07:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.