Subject: + linux-next-rejects.patch added to -mm tree
To: akpm@xxxxxxxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Fri, 11 Oct 2013 14:26:44 -0700
The patch titled
Subject: linux-next-rejects
has been added to the -mm tree. Its filename is
linux-next-rejects.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/linux-next-rejects.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/linux-next-rejects.patch
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: linux-next-rejects
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/mm/init.c | 20 ++++++++++++++++++--
1 file changed, 18 insertions(+), 2 deletions(-)
diff -puN arch/x86/mm/init.c~linux-next-rejects arch/x86/mm/init.c
--- a/arch/x86/mm/init.c~linux-next-rejects
+++ a/arch/x86/mm/init.c
@@ -399,8 +399,24 @@ static unsigned long __init init_range_m
return mapped_ram_size;
}
-/* (PUD_SHIFT-PMD_SHIFT)/2 */
-#define STEP_SIZE_SHIFT 5
+static unsigned long __init get_new_step_size(unsigned long step_size)
+{
+ /*
+ * Explain why we shift by 5 and why we don't have to worry about
+ * 'step_size << 5' overflowing:
+ *
+ * initial mapped size is PMD_SIZE (2M).
+ * We can not set step_size to be PUD_SIZE (1G) yet.
+ * In worse case, when we cross the 1G boundary, and
+ * PG_LEVEL_2M is not set, we will need 1+1+512 pages (2M + 8k)
+ * to map 1G range with PTE. Use 5 as shift for now.
+ *
+ * Don't need to worry about overflow, on 32bit, when step_size
+ * is 0, round_down() returns 0 for start, and that turns it
+ * into 0x100000000ULL.
+ */
+ return step_size << 5;
+}
/**
* memory_map_top_down - Map [map_start, map_end) top down
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
arch-alpha-kernel-systblss-remove-debug-check.patch
i-need-old-gcc.patch
ipc-update-locking-scheme-comments-fix.patch
mm-zswap-bugfix-memory-leak-when-invalidate-and-reclaim-occur-concurrently-checkpatch-fixes.patch
mm-hugetlb-initialize-pg_reserved-for-tail-pages-of-gigantig-compound-pages-fix.patch
kernel-time-tick-commonc-document-tick_do_timer_cpu.patch
makefile-enable-werror=implicit-int-and-werror=strict-prototypes-by-default.patch
mm-readaheadc-do_readhead-dont-check-for-readpage.patch
posix_acl-uninlining.patch
mm.patch
mm-thp-khugepaged-add-policy-for-finding-target-node-fix.patch
mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock-checkpatch-fixes.patch
x86-mm-enable-split-page-table-lock-for-pmd-level-checkpatch-fixes.patch
kernel-printk-printkc-convert-to-pr_foo.patch
maintainers-remove-richard-purdie-as-backlight-maintainer-fix.patch
checkpatch-extend-camelcase-types-and-ignore-existing-camelcase-uses-in-a-patch.patch
checkpatch-add-test-for-defines-of-arch_has_foo.patch
epoll-do-not-take-global-epmutex-for-simple-topologies-fix.patch
binfmt_elfc-use-get_random_int-to-fix-entropy-depleting.patch
init-do_mounts_rdc-fix-null-pointer-dereference-while-loading-initramfs-fix.patch
gcov-add-support-for-gcc-47-gcov-format-fix.patch
gcov-add-support-for-gcc-47-gcov-format-fix-fix.patch
gcov-add-support-for-gcc-47-gcov-format-checkpatch-fixes.patch
kernel-modulec-use-pr_foo.patch
kernel-gcov-fsc-use-pr_warn.patch
linux-next.patch
linux-next-git-rejects.patch
linux-next-rejects.patch
x86-mem-hotplug-support-initialize-page-tables-in-bottom-up-next-fix.patch
mm-drop-actor-argument-of-do_generic_file_read-fix.patch
debugging-keep-track-of-page-owners-fix-2-fix.patch
debugging-keep-track-of-page-owners-fix-2-fix-fix-fix.patch
journal_add_journal_head-debug.patch
kernel-forkc-export-kernel_thread-to-modules.patch
mutex-subsystem-synchro-test-module.patch
slab-leaks3-default-y.patch
put_bh-debug.patch
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