The patch titled
aio: make aio_ring_info->nr_pages an unsigned int
has been removed from the -mm tree. Its filename was
aio-make-aio_ring_info-nr_pages-an-unsigned-int.patch
This patch was dropped because it was nacked by the maintainer
------------------------------------------------------
Subject: aio: make aio_ring_info->nr_pages an unsigned int
From: "Chen, Kenneth W" <kenneth.w.chen@xxxxxxxxx>
The number of io_event in AIO event queue allowed currently is no more
than 2^32-1, because the syscall defines:
asmlinkage long sys_io_setup(unsigned nr_events, aio_context_t __user *ctxp)
We internally allocate a ring buffer for nr_events and keeps tracks of
page descriptors for each of these ring buffer pages. Since page size
is significantly larger than AIO event size (4096 versus 32), I don't
think it is ever possible to overflow nr_pages in 32-bit quantity.
This patch changes nr_pages to unsigned int. on 64-bit arch, changing
it to unsigned int also allows better packing of aio_ring_info structure.
Signed-off-by: Ken Chen <kenneth.w.chen@xxxxxxxxx>
Cc: Zach Brown <zach.brown@xxxxxxxxxx>
Cc: Suparna Bhattacharya <suparna@xxxxxxxxxx>
Cc: Benjamin LaHaise <bcrl@xxxxxxxxx>
Cc: Badari Pulavarty <pbadari@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
include/linux/aio.h | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
diff -puN include/linux/aio.h~aio-make-aio_ring_info-nr_pages-an-unsigned-int include/linux/aio.h
--- a/include/linux/aio.h~aio-make-aio_ring_info-nr_pages-an-unsigned-int
+++ a/include/linux/aio.h
@@ -165,7 +165,7 @@ struct aio_ring_info {
struct page **ring_pages;
spinlock_t ring_lock;
- long nr_pages;
+ unsigned nr_pages;
unsigned nr, tail;
_
Patches currently in -mm which might be from kenneth.w.chen@xxxxxxxxx are
ia64-alignment-bug-in-ldscript.patch
aio-fix-buggy-put_ioctx-call-in-aio_complete-v2.patch
aio-make-aio_ring_info-nr_pages-an-unsigned-int.patch
mm-only-sched-add-a-few-scheduler-event-counters.patch
-
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