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Christophe Leroy 2d17ab8874 powerpc/modules: Don't WARN on first module allocation attempt 
[ Upstream commit f1797e4de1 ]

module_alloc() first tries to allocate module text within 24 bits direct
jump from kernel text, and tries a wider allocation if first one fails.

When first allocation fails the following is observed in kernel logs:

  vmap allocation for size 2400256 failed: use vmalloc=<size> to increase size
  systemd-udevd: vmalloc error: size 2395133, vm_struct allocation failed, mode:0xcc0(GFP_KERNEL), nodemask=(null)
  CPU: 0 PID: 127 Comm: systemd-udevd Tainted: G        W         5.15.5-gentoo-PowerMacG4 #9
  Call Trace:
  [e2a53a50] [c0ba0048] dump_stack_lvl+0x80/0xb0 (unreliable)
  [e2a53a70] [c0540128] warn_alloc+0x11c/0x2b4
  [e2a53b50] [c0531be8] __vmalloc_node_range+0xd8/0x64c
  [e2a53c10] [c00338c0] module_alloc+0xa0/0xac
  [e2a53c40] [c027a368] load_module+0x2ae0/0x8148
  [e2a53e30] [c027fc78] sys_finit_module+0xfc/0x130
  [e2a53f30] [c0035098] ret_from_syscall+0x0/0x28
  ...

Add __GFP_NOWARN flag to first allocation so that no warning appears
when it fails.

Reported-by: Erhard Furtner <erhard_f@mailbox.org>
Fixes: 2ec13df167 ("powerpc/modules: Load modules closer to kernel text")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/93c9b84d6ec76aaf7b4f03468e22433a6d308674.1638267035.git.christophe.leroy@csgroup.eu
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-01-27 11:04:08 +01:00
arch powerpc/modules: Don't WARN on first module allocation attempt 2022-01-27 11:04:08 +01:00
block block: fix error unwinding in device_add_disk 2022-01-27 11:03:43 +01:00
certs certs: Add support for using elliptic curve keys for signing modules 2021-08-23 19:55:42 +03:00
crypto crypto: pcrypt - Delay write to padata->info 2021-11-18 19:16:44 +01:00
Documentation dt-bindings: thermal: Fix definition of cooling-maps contribution property 2022-01-27 11:04:07 +01:00
drivers RDMA/rtrs-clt: Fix the initial value of min_latency 2022-01-27 11:04:07 +01:00
fs ext4: avoid trim error on fs with small groups 2022-01-27 11:04:04 +01:00
include ALSA: hda: Fix potential deadlock at codec unbinding 2022-01-27 11:04:05 +01:00
init init: make unknown command line param message clearer 2021-11-18 19:17:11 +01:00
ipc shm: extend forced shm destroy to support objects from several IPC nses 2021-11-25 09:48:42 +01:00
kernel bpf: Fix verifier support for validation of async callbacks 2022-01-27 11:03:51 +01:00
lib lib/mpi: Add the return value check of kcalloc() 2022-01-27 11:03:58 +01:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm shmem: fix a race between shmem_unused_huge_shrink and shmem_evict_inode 2022-01-27 11:03:01 +01:00
net net: openvswitch: Fix ct_state nat flags for conns arriving from tc 2022-01-27 11:04:02 +01:00
samples samples: bpf: Fix 'unknown warning group' build warning on Clang 2022-01-27 11:03:29 +01:00
scripts recordmcount.pl: fix typo in s390 mcount regex 2022-01-05 12:42:33 +01:00
security selinux: fix potential memleak in selinux_add_opt() 2022-01-27 11:03:43 +01:00
sound ALSA: hda: Make proper use of timecounter 2022-01-27 11:04:07 +01:00
tools bpftool: Enable line buffering for stdout 2022-01-27 11:03:45 +01:00
usr .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
virt KVM: downgrade two BUG_ONs to WARN_ON_ONCE 2021-12-22 09:32:34 +01:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap mailmap: add Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS drm fixes for 5.15 final 2021-10-28 12:17:01 -07:00
Makefile Linux 5.15.16 2022-01-20 09:13:16 +01:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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 Restructured Text 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.