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SubjectRe: Linux 6.2-rc3
On Sun, Jan 08, 2023 at 12:06:47PM -0600, Linus Torvalds wrote:
> Here we are, another week done, and things are starting to look a lot
> more normal after that very quiet holiday week that made rc2 so very
> small.
>
> Nothing in particular here stands out: the bulk of this is driver
> fixes (networking, gpu, block, virtio - but also usb, fbdev, rdma etc,
> so a little bit of everything). That is as should be, and just
> matches where the bulk of the code is.
>
> Outside of the various driver fixes, we've got core networking, some
> filesystem fixes (btrfs, cifs, f2fs and nfs), and some perf tooling
> work.
>
> With the rest being mostly selftests and documentation.
>
> The shortlog is below, plase do give it a good test, and holler if you
> find anything.
>

Build results:
total: 155 pass: 151 fail: 4
Failed builds:
powerpc:allmodconfig
sh:defconfig
sh:shx3_defconfig
xtensa:allmodconfig
Qemu test results:
total: 500 pass: 500 fail: 0

No change with compile tests (included again below for reference).
The good news is that the runtime/boot tests now all pass.

Guenter

---
Build errors
============

Building powerpc:allmodconfig ... failed
--------------
Error log:
In file included from include/linux/string.h:253,
from arch/powerpc/include/asm/paca.h:16,
from arch/powerpc/include/asm/current.h:13,
from include/linux/thread_info.h:23,
from include/asm-generic/preempt.h:5,
from ./arch/powerpc/include/generated/asm/preempt.h:1,
from include/linux/preempt.h:78,
from include/linux/spinlock.h:56,
from include/linux/wait.h:9,
from include/linux/wait_bit.h:8,
from include/linux/fs.h:6,
from fs/f2fs/inline.c:9:
fs/f2fs/inline.c: In function 'f2fs_move_inline_dirents':
include/linux/fortify-string.h:59:33: error: '__builtin_memset' pointer overflow between offset [28, 898293814] and size [-898293787, -1] [-Werror=array-bounds]
59 | #define __underlying_memset __builtin_memset
| ^
include/linux/fortify-string.h:337:9: note: in expansion of macro '__underlying_memset'
337 | __underlying_memset(p, c, __fortify_size); \
| ^~~~~~~~~~~~~~~~~~~
include/linux/fortify-string.h:345:25: note: in expansion of macro '__fortify_memset_chk'
345 | #define memset(p, c, s) __fortify_memset_chk(p, c, s, \
| ^~~~~~~~~~~~~~~~~~~~
fs/f2fs/inline.c:430:9: note: in expansion of macro 'memset'
430 | memset(dst.bitmap + src.nr_bitmap, 0, dst.nr_bitmap - src.nr_bitmap);
| ^~~~~~
cc1: all warnings being treated as errors

xtensa:allmodconfig

Building xtensa:allmodconfig ... failed
--------------
Error log:
kernel/kcsan/kcsan_test.c: In function '__report_matches':
kernel/kcsan/kcsan_test.c:257:1: error: the frame size of 1680 bytes is larger than 1536 bytes

Bisect for both points to commit e240e53ae0abb08 ("mm, slub: add
CONFIG_SLUB_TINY"). Reverting it on its own is not possible, but
reverting the following two patches fixes the problem.

149b6fa228ed mm, slob: rename CONFIG_SLOB to CONFIG_SLOB_DEPRECATED
e240e53ae0ab mm, slub: add CONFIG_SLUB_TINY

Context: CONFIG_SLUB_TINY is enabled with allmodconfig builds.
This enables some previously disabled configurations and disables
some previously enabled configurations.

---
sh:defconfig
sh:shx3_defconfig

Building sh:defconfig ... failed
--------------
Error log:
In file included from <command-line>:
In function 'follow_pmd_mask',
inlined from 'follow_pud_mask' at mm/gup.c:735:9,
inlined from 'follow_p4d_mask' at mm/gup.c:752:9,
inlined from 'follow_page_mask' at mm/gup.c:809:9:
include/linux/compiler_types.h:358:45: error: call to '__compiletime_assert_263' declared with attribute error: Unsupported access size for {READ,WRITE}_ONCE().
358 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)

Bisect points to commit 0862ff059c9e ("sh/mm: Make pmd_t similar to pte_t").
This commit introduces

-typedef struct { unsigned long long pmd; } pmd_t;
+typedef struct {
+ struct {
+ unsigned long pmd_low;
+ unsigned long pmd_high;
+ };
+ unsigned long long pmd;
+} pmd_t;

That should probably be "typedef union", not "typedef struct".

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