Mikulas Patocka a09a79f668 Don't lock guardpage if the stack is growing up ...

Linux kernel excludes guard page when performing mlock on a VMA with
down-growing stack. However, some architectures have up-growing stack
and locking the guard page should be excluded in this case too.

This patch fixes lvm2 on PA-RISC (and possibly other architectures with
up-growing stack). lvm2 calculates number of used pages when locking and
when unlocking and reports an internal error if the numbers mismatch.

[ Patch changed fairly extensively to also fix /proc/<pid>/maps for the
  grows-up case, and to move things around a bit to clean it all up and
  share the infrstructure with the /proc bits.

  Tested on ia64 that has both grow-up and grow-down segments  - Linus ]

Signed-off-by: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Tested-by: Tony Luck <tony.luck@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2011-05-09 16:22:07 -07:00

..

array.c

proc: protect mm start_code/end_code in /proc/pid/stat

2011-03-23 19:46:37 -07:00

base.c

proc: do proper range check on readdir offset

2011-04-18 10:36:54 -07:00

cmdline.c

…

consoles.c

…

cpuinfo.c

…

devices.c

…

generic.c

proc: make struct proc_dir_entry::namelen unsigned int

2011-03-23 19:46:37 -07:00

inode.c

procfs: kill the global proc_mnt variable

2011-03-23 19:46:58 -07:00

internal.h

procfs: kill the global proc_mnt variable

2011-03-23 19:46:58 -07:00

interrupts.c

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Kconfig

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kcore.c

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kmsg.c

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loadavg.c

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Makefile

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meminfo.c

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mmu.c

…

nommu.c

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page.c

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proc_devtree.c

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proc_net.c

…

proc_sysctl.c

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proc_tty.c

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root.c

procfs: kill the global proc_mnt variable

2011-03-23 19:46:58 -07:00

softirqs.c

…

stat.c

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task_mmu.c

Don't lock guardpage if the stack is growing up

2011-05-09 16:22:07 -07:00

task_nommu.c

report errors in /proc/*/*map* sanely

2011-03-23 16:36:50 -04:00

uptime.c

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version.c

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vmcore.c

…