android_kernel_xiaomi_sm8350/arch
Hugh Dickins 0b14c179a4 [PATCH] unpaged: VM_UNPAGED
Although we tend to associate VM_RESERVED with remap_pfn_range, quite a few
drivers set VM_RESERVED on areas which are then populated by nopage.  The
PageReserved removal in 2.6.15-rc1 changed VM_RESERVED not to free pages in
zap_pte_range, without changing those drivers not to set it: so their pages
just leak away.

Let's not change miscellaneous drivers now: introduce VM_UNPAGED at the core,
to flag the special areas where the ptes may have no struct page, or if they
have then it's not to be touched.  Replace most instances of VM_RESERVED in
core mm by VM_UNPAGED.  Force it on in remap_pfn_range, and the sparc and
sparc64 io_remap_pfn_range.

Revert addition of VM_RESERVED to powerpc vdso, it's not needed there.  Is it
needed anywhere?  It still governs the mm->reserved_vm statistic, and special
vmas not to be merged, and areas not to be core dumped; but could probably be
eliminated later (the drivers are probably specifying it because in 2.4 it
kept swapout off the vma, but in 2.6 we work from the LRU, which these pages
don't get on).

Use the VM_SHM slot for VM_UNPAGED, and define VM_SHM to 0: it serves no
purpose whatsoever, and should be removed from drivers when we clean up.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Acked-by: William Irwin <wli@holomorphy.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-22 09:13:42 -08:00
..
alpha [PATCH] sched: resched and cpu_idle rework 2005-11-09 07:56:33 -08:00
arm [ARM] Shut up gcc warning in clps7500 core.c 2005-11-21 17:03:15 +00:00
arm26 [PATCH] sched: disable preempt in idle tasks 2005-11-09 07:56:33 -08:00
cris [PATCH] sched: disable preempt in idle tasks 2005-11-09 07:56:33 -08:00
frv [PATCH] move pm_register/etc. to CONFIG_PM_LEGACY, pm_legacy.h 2005-11-13 18:14:10 -08:00
h8300 [PATCH] sched: disable preempt in idle tasks 2005-11-09 07:56:33 -08:00
i386 [PATCH] Register disabled CPUs 2005-11-20 11:52:59 -08:00
ia64 [IA64-SGI] bte_copy nasid_index fix 2005-11-21 14:19:36 -08:00
m32r [PATCH] sched: disable preempt in idle tasks 2005-11-09 07:56:33 -08:00
m68k [PATCH] m68k: convert thread flags to use bit fields 2005-11-13 18:14:14 -08:00
m68knommu [PATCH] m68knommu: move some platform irq support out of irq.h 2005-11-07 08:00:47 -08:00
mips [MIPS] Update defconfigs 2005-11-17 16:23:58 +00:00
parisc [PARISC] Remove unused variable in signal.c 2005-11-17 16:43:52 -05:00
powerpc [PATCH] unpaged: VM_UNPAGED 2005-11-22 09:13:42 -08:00
ppc powerpc: Fix a couple of compile warnings for 32-bit compiles 2005-11-18 15:54:12 +11:00
s390 [PATCH] sched: resched and cpu_idle rework 2005-11-09 07:56:33 -08:00
sh [PATCH] sched: resched and cpu_idle rework 2005-11-09 07:56:33 -08:00
sh64 [PATCH] sched: resched and cpu_idle rework 2005-11-09 07:56:33 -08:00
sparc [PATCH] unpaged: VM_UNPAGED 2005-11-22 09:13:42 -08:00
sparc64 [PATCH] unpaged: VM_UNPAGED 2005-11-22 09:13:42 -08:00
um [PATCH] uml: eliminate use of libc PAGE_SIZE 2005-11-22 09:13:41 -08:00
v850 [PATCH] v850: use generic hardirq code 2005-11-15 08:59:20 -08:00
x86_64 Merge x86-64 update from Andi 2005-11-14 19:56:02 -08:00
xtensa Merge master.kernel.org:/home/rmk/linux-2.6-drvmodel 2005-11-11 09:24:26 -08:00