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Jonathan Lemon 8d73f8f23e page_pool: fix logic in __page_pool_get_cached
__page_pool_get_cached() will return NULL when the ring is
empty, even if there are pages present in the lookaside cache.

It is also possible to refill the cache, and then return a
NULL page.

Restructure the logic so eliminate both cases.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-15 12:27:36 -07:00
arch Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-08-06 18:44:57 -07:00
block
certs
crypto
Documentation Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2019-08-13 16:24:57 -07:00
drivers netdevsim: implement support for devlink region and snapshots 2019-08-15 12:02:44 -07:00
fs Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-08-06 17:11:59 -07:00
include netfilter: remove deprecation warnings from uapi headers. 2019-08-14 23:36:27 +02:00
init
ipc
kernel Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2019-08-13 16:24:57 -07:00
lib Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-08-06 17:11:59 -07:00
LICENSES
mm memremap: move from kernel/ to mm/ 2019-08-03 07:02:01 -07:00
net page_pool: fix logic in __page_pool_get_cached 2019-08-15 12:27:36 -07:00
samples Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2019-08-13 16:24:57 -07:00
scripts Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2019-08-13 16:24:57 -07:00
security
sound
tools selftests: netdevsim: add devlink regions tests 2019-08-15 12:02:44 -07:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-08-06 18:44:57 -07:00
Makefile Linux 5.3-rc3 2019-08-04 18:40:12 -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 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.