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HATAYAMA Daisuke 83086978c6 vmcore: support mmap() on /proc/vmcore ... This patch introduces mmap_vmcore(). Don't permit writable nor executable mapping even with mprotect() because this mmap() is aimed at reading crash dump memory. Non-writable mapping is also requirement of remap_pfn_range() when mapping linear pages on non-consecutive physical pages; see is_cow_mapping(). Set VM_MIXEDMAP flag to remap memory by remap_pfn_range and by remap_vmalloc_range_pertial at the same time for a single vma. do_munmap() can correctly clean partially remapped vma with two functions in abnormal case. See zap_pte_range(), vm_normal_page() and their comments for details. On x86-32 PAE kernels, mmap() supports at most 16TB memory only. This limitation comes from the fact that the third argument of remap_pfn_range(), pfn, is of 32-bit length on x86-32: unsigned long. [akpm@linux-foundation.org: use min(), switch to conventional error-unwinding approach] Signed-off-by: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Acked-by: Vivek Goyal <vgoyal@redhat.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Atsushi Kumagai <kumagai-atsushi@mxc.nes.nec.co.jp> Cc: Lisa Mitchell <lisa.mitchell@hp.com> Cc: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Tested-by: Maxim Uvarov <muvarov@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		12 years ago
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Kconfig	kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT	14 years ago
Makefile	mm, vmalloc: move get_vmalloc_info() to vmalloc.c	12 years ago
array.c	kthread: Prevent unpark race which puts threads on the wrong cpu	12 years ago
base.c	proc_fill_cache(): clean up, get rid of pointless find_inode_number() use	12 years ago
cmdline.c	…
consoles.c	console: rename acquire/release_console_sem() to console_lock/unlock()	14 years ago
cpuinfo.c	…
devices.c	proc: use seq_puts()/seq_putc() where possible	14 years ago
fd.c	proc_fill_cache(): just make instantiate_t return int	12 years ago
fd.h	proc: Move proc_fd() to fs/proc/fd.h	12 years ago
generic.c	[readdir] convert procfs	12 years ago
inode.c	proc: Split the namespace stuff out into linux/proc_ns.h	12 years ago
internal.h	proc_fill_cache(): just make instantiate_t return int	12 years ago
interrupts.c	…
kcore.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	12 years ago
kmsg.c	kmsg: honor dmesg_restrict sysctl on /dev/kmsg	12 years ago
loadavg.c	…
meminfo.c	mm, vmalloc: move get_vmalloc_info() to vmalloc.c	12 years ago
namespaces.c	proc_fill_cache(): just make instantiate_t return int	12 years ago
nommu.c	new helper: file_inode(file)	12 years ago
page.c	kpageflags: fix wrong KPF_THP on non-huge compound pages	13 years ago
proc_devtree.c	proc_devtree: Replace include linux/module.h with linux/export.h	12 years ago
proc_net.c	[readdir] convert procfs	12 years ago
proc_sysctl.c	Don't pass inode to ->d_hash() and ->d_compare()	12 years ago
proc_tty.c	proc: use seq_puts()/seq_putc() where possible	14 years ago
root.c	[readdir] convert procfs	12 years ago
self.c	Include missing linux/slab.h inclusions	12 years ago
softirqs.c	proc: use seq_puts()/seq_putc() where possible	14 years ago
stat.c	stat: Use size_t for sizes instead of unsigned	12 years ago
task_mmu.c	pagemap: prepare to reuse constant bits with page-shift	12 years ago
task_nommu.c	new helper: file_inode(file)	12 years ago
uptime.c	Merge branch 'sched/core' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into cputime-tip	13 years ago
version.c	…
vmcore.c	vmcore: support mmap() on /proc/vmcore	12 years ago