Webextern void early_ioremap_setup(void); /* * Called as last step in paging_init() so library can act * accordingly for subsequent map/unmap requests. */ extern void early_ioremap_reset(void); /* * Early copy from unmapped memory to kernel mapped … WebRed Hat Insights Increase visibility into IT operations to detect and resolve technical issues before they impact your business.
Bus-Independent Device Accesses — The Linux Kernel documentation
WebJan 12, 2015 · Commit 0e63ea48b4d8 (arm64/efi: add missing call to early_ioremap_reset()) added a missing call to early_ioremap_reset(). This triggers a BUG if code tries using early_ioremap() after the early_ioremap_reset(). This is a problem for some ACPI code which needs short-lived temporary mappings after paging_init() but … WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH] x86_32: Construct 32 bit boot time page tables in native format. @ 2008-01-21 22:15 Ian Campbell 0 siblings, 0 replies; only message in thread From: Ian Campbell @ 2008-01-21 22:15 UTC (permalink / raw) To: linux-kernel Cc: Ian Campbell, Thomas Gleixner, Ingo Molnar, H. … raymond maine food pantry
[ 15/82] pcdp: use early_ioremap/early_iounmap to access pcdp …
WebThe initial usage is to support the large graphics aperture on 32-bit processors where ioremap_wc cannot be used to statically map the entire aperture to the CPU as it would consume too much of the kernel address space. A mapping object is created during … WebAug 29, 2009 · I too get this warning message. My "hardware" is a qemu 0.9.1-1ubuntu1 virtual machine, and the kernel is Linux ubuntu 2.6.30-8-generic #9-Ubuntu SMP Wed Jun 3 15:23:55 UTC 2009 i686 GNU/Linux from the live cd of Kubuntu 9.10 karmic alpha 2 … WebOct 16, 2012 · I have a working version of the driver, but it's currently very slow. So, I've gone back a few steps and tried making a small, simple driver to recreate the problem. I reserve the memory at boot time using the kernel parameter memmap=2G$1G. Then, in the driver's __init function, I ioremap some of this memory, and initialize it to a known value. simplified method gst/hst