]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
maccess: unexport probe_kernel_write()
authorChristoph Hellwig <hch@lst.de>
Tue, 9 Jun 2020 04:33:58 +0000 (21:33 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 9 Jun 2020 16:39:15 +0000 (09:39 -0700)
commit0493cb086353e786be56010780a0b7025b5db34c
tree08faebc2febe8a22f67f9bd6f45f7d168c68c831
parentc1e8d7c6a7a682e1405e3e242d32fc377fd196ff
maccess: unexport probe_kernel_write()

Patch series "clean up and streamline probe_kernel_* and friends", v4.

This series start cleaning up the safe kernel and user memory probing
helpers in mm/maccess.c, and then allows architectures to implement the
kernel probing without overriding the address space limit and temporarily
allowing access to user memory.  It then switches x86 over to this new
mechanism by reusing the unsafe_* uaccess logic.

This version also switches to the saner copy_{from,to}_kernel_nofault
naming suggested by Linus.

I kept the x86 helpers as-is without calling unsage_{get,put}_user as that
avoids a number of hard to trace casts, and it will still work with the
asm-goto based version easily.

This patch (of 20):

probe_kernel_write() is not used by any modular code.

[sfr@canb.auug.org.au: turns out that probe_user_write is used in modular code]
Link: http://lkml.kernel.org/r/20200602195741.4faaa348@canb.auug.org.au
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20200521152301.2587579-1-hch@lst.de
Link: http://lkml.kernel.org/r/20200521152301.2587579-2-hch@lst.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/maccess.c