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Linus Torvalds 498e47cd1d Fix build errors due to new UIO_MEM_DMA_COHERENT mess 
Commit 576882ef5e ("uio: introduce UIO_MEM_DMA_COHERENT type")
introduced a new use-case for 'struct uio_mem' where the 'mem' field now
contains a kernel virtual address when 'memtype' is set to
UIO_MEM_DMA_COHERENT.

That in turn causes build errors, because 'mem' is of type
'phys_addr_t', and a virtual address is a pointer type.  When the code
just blindly uses cast to mix the two, it caused problems when
phys_addr_t isn't the same size as a pointer - notably on 32-bit
architectures with PHYS_ADDR_T_64BIT.

The proper thing to do would probably be to use a union member, and not
have any casts, and make the 'mem' member be a union of 'mem.physaddr'
and 'mem.vaddr', based on 'memtype'.

This is not that proper thing.  This is just fixing the ugly casts to be
even uglier, but at least not cause build errors on 32-bit platforms
with 64-bit physical addresses.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Fixes: 576882ef5e ("uio: introduce UIO_MEM_DMA_COHERENT type")
Fixes: 7722151e46 ("uio_pruss: UIO_MEM_DMA_COHERENT conversion")
Fixes: 019947805a ("uio_dmem_genirq: UIO_MEM_DMA_COHERENT conversion")
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Chris Leech <cleech@redhat.com>
Cc: Nilesh Javali <njavali@marvell.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linuxfoundation.org>
2024-03-27 09:48:47 -07:00
arch EFI fixes for v6.9 #2 2024-03-24 13:54:06 -07:00
block
certs
crypto This push fixes a regression that broke iwd as well as a divide by 2024-03-25 10:48:23 -07:00
Documentation A set of x86 fixes: 2024-03-24 11:13:56 -07:00
drivers Fix build errors due to new UIO_MEM_DMA_COHERENT mess 2024-03-27 09:48:47 -07:00
fs gfs2 fix 2024-03-25 10:53:39 -07:00
include This push fixes a regression that broke iwd as well as a divide by 2024-03-25 10:48:23 -07:00
init RISC-V Patches for the 6.9 Merge Window 2024-03-22 10:41:13 -07:00
io_uring
ipc
kernel Fix memory leak in posix_clock_open() 2024-03-27 09:03:22 -07:00
lib hardening fixes for v6.9-rc1 2024-03-23 08:43:21 -07:00
LICENSES
mm RISC-V Patches for the 6.9 Merge Window 2024-03-22 10:41:13 -07:00
net Including fixes from CAN, netfilter, wireguard and IPsec. 2024-03-21 14:50:39 -07:00
rust Kbuild updates for v6.9 2024-03-21 14:41:00 -07:00
samples
scripts LoongArch changes for v6.9 2024-03-22 10:22:45 -07:00
security
sound sound fixes #2 for 6.9-rc2 2024-03-22 09:44:19 -07:00
tools RISC-V Patches for the 6.9 Merge Window 2024-03-22 10:41:13 -07:00
usr
virt
.clang-format
.cocciconfig
.editorconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap Char/Misc and other driver subsystem updates for 6.9-rc1 2024-03-21 13:21:31 -07:00
.rustfmt.toml
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS RISC-V Patches for the 6.9 Merge Window 2024-03-22 10:41:13 -07:00
Makefile Linux 6.9-rc1 2024-03-24 14:10:05 -07:00
README

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.