b7a67e02cd
The following commit in 2013:
77ea8c9489 ("x86: Reserve setup_data ranges late after parsing memmap cmdline")
has fixed the issue of losing setup_data information by deferring the
e820_reserve_setup_data() call until the early params have been parsed.
But this also introduced a new problem that, during early params parsing,
the kexec kernel might fake a mptable and saves it into the e820_table_firmware[]
table (without saving the mptable to the e820_table[]), however the subsequent
invoking of e820_reserve_setup_data() will overwrite the e820_table_firmware[]
according to the e820_table[], thus the fake mptable information is lost.
Fix this issue by updating the e820_table_firmware[] according to
the setup_data information, but without overwriting it.
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Xunlei Pang <xlpang@redhat.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.