Alexander Sverdlin a6335fa11e MIPS: bootmem: Don't use memory holes for page bitmap ... Commit f9a7febd leads to a fact that mapstart and therefore a page bitmap for bootmem allocator immediately follows initrd_end. This doesn't always work well on Octeon, where there are holes in PFN ranges (refer to 5b3b1688 and 4MB-aligned PFN allocation). Depending on the inird location it could happen, that mapstart would be in an area not allocated by plat_mem_setup() in arch/mips/cavium-octeon/setup.c, but in the alignment hole between initrd and the next PFN area. Later on this memory will be unconditionally made available to buddy allocator at the end of free_all_bootmem_core() (mm/bootmem.c). All of this results in Linux using the memory not designated for Linux in Octeon's plat_mem_setup(), which in turn means corruption of the memory used by another OS/baremetal code on the same SoC. It doesn't look to me as a problem of Octeon platform code, but rather as an inability of f9a7febd to deal correctly with the fragmented memory-mappings. Proposed fix moves the check for initrd address to the same calculation-loop in bootmem_init() (arch/mips/kernel/setup.c), which also accounts for kernel code location. This should result in mapstart located starting from the first PFN area after kernel code AND initrd. Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com> Cc: linux-mips@linux-mips.org Cc: David Daney <david.daney@cavium.com> Cc: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> Cc: Huacai Chen <chenhc@lemote.com> Cc: Andreas Herrmann <andreas.herrmann@caviumnetworks.com> Cc: Joe Perches <joe@perches.com> Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: Yusuf Khan <yusuf.khan@nokia.com> Cc: Michael Kreuzer <michael.kreuzer@nokia.com> Cc: Aaro Koskinen <aaro.koskinen@iki.fi> Patchwork: https://patchwork.linux-mips.org/patch/10594/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>		2015-07-09 11:02:59 +02:00
..
alpha
arc	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-07-04 19:36:06 -07:00
arm	- hwspinlock core DT support from Suman Anna	2015-07-03 14:52:25 -07:00
arm64	Various arm64 fixes:	2015-07-03 12:28:30 -07:00
avr32
blackfin	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-07-04 19:36:06 -07:00
c6x
cris	Replace module_init with equivalent device_initcall in non modules.	2015-07-02 10:30:48 -07:00
frv	Fix up implicit <module.h> users that will break later.	2015-07-02 10:25:22 -07:00
h8300
hexagon
ia64	remove some boot noise from a now-invalid check that pages are reserved	2015-07-02 14:46:15 -07:00
m32r
m68k
metag
microblaze
mips	MIPS: bootmem: Don't use memory holes for page bitmap	2015-07-09 11:02:59 +02:00
mn10300	Replace module_init with equivalent device_initcall in non modules.	2015-07-02 10:30:48 -07:00
nios2	nios2 update for v4.2	2015-07-03 12:22:49 -07:00
openrisc
parisc	Replace module_init with equivalent device_initcall in non modules.	2015-07-02 10:30:48 -07:00
powerpc	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-07-04 19:36:06 -07:00
s390	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-07-04 19:36:06 -07:00
score
sh	Replace module_init with equivalent device_initcall in non modules.	2015-07-02 10:30:48 -07:00
sparc
tile	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-07-04 19:36:06 -07:00
um
unicore32
x86	platform-drivers-x86 for 4.2-2	2015-07-05 10:54:09 -07:00
xtensa	Replace module_init with equivalent device_initcall in non modules.	2015-07-02 10:30:48 -07:00
.gitignore
Kconfig