Subject: linux-next: boot warning after merge of the vfs-brauner tree

From: Stephen Rothwell <[email-masked]>
Date: Mon, 26 Aug 2024 17:59:31 +1000

Hi all,

After merging the vfs-brauner tree, today's linux-next boot test (powerpc
pseries_le_defconfig) produced this warning:

------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at arch/powerpc/mm/pageattr.c:97 change_memory_attr+0xbc/0x150
Modules linked in:
CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.11.0-rc5-06731-g66e0882fba22 #1
Hardware name: IBM pSeries (emulated by qemu) POWER8 (architected) 0x4d0200 0xf000004 of:SLOF,HEAD pSeries
NIP:  c00000000008a1ac LR: c00000000008a14c CTR: 0000000000000000
REGS: c0000000049b7930 TRAP: 0700   Not tainted  (6.11.0-rc5-06731-g66e0882fba22)
MSR:  8000000002029033 <SF,VEC,EE,ME,IR,DR,RI,LE>  CR: 84000482  XER: 00000000
CFAR: c00000000008a218 IRQMASK: 0 
GPR00: c00000000008a14c c0000000049b7bd0 c00000000167b100 0000000000000000 
GPR04: 0000000000000001 0000000000000000 0000000000000200 c000000002b10878 
GPR08: 000000007da60000 c007ffffffffffff ffffffffffffffff 0000000084000482 
GPR12: 0000000000000180 c000000002b90000 c00000000001110c 0000000000000000 
GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
GPR20: 0000000000000000 0000000000000000 0000000000000000 c000000001562288 
GPR24: c000000002003e6c c000000001632418 000000000000018c c0000000020c1058 
GPR28: 0000000000000000 0000000000000000 c000000006330000 0000000000000001 
NIP [c00000000008a1ac] change_memory_attr+0xbc/0x150
LR [c00000000008a14c] change_memory_attr+0x5c/0x150
Call Trace:
[c0000000049b7bd0] [000000000000018c] 0x18c (unreliable)
[c0000000049b7c10] [c00000000206bf70] iomap_dio_init+0x64/0x88
[c0000000049b7c30] [c000000000010d98] do_one_initcall+0x80/0x2f8
[c0000000049b7d00] [c000000002005c9c] kernel_init_freeable+0x32c/0x520
[c0000000049b7de0] [c000000000011138] kernel_init+0x34/0x26c
[c0000000049b7e50] [c00000000000debc] ret_from_kernel_user_thread+0x14/0x1c
--- interrupt: 0 at 0x0
Code: 60000000 e8010050 eba10028 7c6307b4 ebc10030 38210040 ebe1fff8 7c0803a6 4e800020 7bc92720 2c29000c 41820058 <0fe00000> 4800002c 60000000 60000000 
---[ end trace 0000000000000000 ]---

Bisected to commit

  d940b3b7b76b ("iomap: fix iomap_dio_zero() for fs bs > system page size")

I have reverted commit

  9b0ebbc72358 ("Merge patch series "enable bs > ps in XFS"")

for today.

-- 
Cheers,
Stephen Rothwell