[GIT PULL] memblock, arm: fixup for the pfn_valid() rework for v5.14-rc1

* [GIT PULL] memblock, arm: fixup for the pfn_valid() rework for v5.14-rc1
@ 2021-07-09 18:46 Mike Rapoport
  2021-07-10 17:35 ` pr-tracker-bot
  0 siblings, 1 reply; 2+ messages in thread
From: Mike Rapoport @ 2021-07-09 18:46 UTC (permalink / raw)
  To: Linus Torvalds
  Cc: Andrew Morton, Kefeng Wang, Guenter Roeck, Mike Rapoport,
	Mike Rapoport, Russell King, linux-arm-kernel, linux-kernel,
	linux-mm

Hi Linus,

This is a fix for the rework of ARM's pfn_valid() implementation merged
during this merge window.

The following changes since commit a180bd1d7e16173d965b263c5a536aa40afa2a2a:

  iov_iter: remove uaccess_kernel() warning from iov_iter_init() (2021-07-04 16:12:42 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock.git tags/fixes-2021-07-09

for you to fetch changes up to 024591f9a6e0164ec23301784d1e6d8f6cacbe59:

  arm: ioremap: don't abuse pfn_valid() to check if pfn is in RAM (2021-07-06 09:01:47 +0300)

----------------------------------------------------------------
arm: ioremap: don't abuse pfn_valid() to check if pfn is in RAM

The semantics of pfn_valid() is to check presence of the memory map for a
PFN and not whether a PFN is in RAM. The memory map may be present for a
hole in the physical memory and if such hole corresponds to an MMIO range,
__arm_ioremap_pfn_caller() will produce a WARN() and fail:

Use memblock_is_map_memory() instead of pfn_valid() to check if a PFN is in
RAM or not.

----------------------------------------------------------------
Mike Rapoport (1):
      arm: ioremap: don't abuse pfn_valid() to check if pfn is in RAM

 arch/arm/mm/ioremap.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
-- 
Sincerely yours,
Mike.

^ permalink raw reply	[flat|nested] 2+ messages in thread