Tom Hromatka 592d0e60a2 sparc64: Fix kernel panic due to erroneous #ifdef surrounding pmd_write() ... [ Upstream commit 9ae34dbd8afd790cb5f52467e4f816434379eafa ] This commit moves sparc64's prototype of pmd_write() outside of the CONFIG_TRANSPARENT_HUGEPAGE ifdef. In 2013, commit a7b9403f0e ("sparc64: Encode huge PMDs using PTE encoding.") exposed a path where pmd_write() could be called without CONFIG_TRANSPARENT_HUGEPAGE defined. This can result in the panic below. The diff is awkward to read, but the changes are straightforward. pmd_write() was moved outside of #ifdef CONFIG_TRANSPARENT_HUGEPAGE. Also, __HAVE_ARCH_PMD_WRITE was defined. kernel BUG at include/asm-generic/pgtable.h:576! \|/ ____ \|/ "@'/ .. \`@" /_| \__/ |_\ \__U_/ oracle_8114_cdb(8114): Kernel bad sw trap 5 [#1] CPU: 120 PID: 8114 Comm: oracle_8114_cdb Not tainted 4.1.12-61.7.1.el6uek.rc1.sparc64 #1 task: fff8400700a24d60 ti: fff8400700bc4000 task.ti: fff8400700bc4000 TSTATE: 0000004411e01607 TPC: 00000000004609f8 TNPC: 00000000004609fc Y: 00000005 Not tainted TPC: <gup_huge_pmd+0x198/0x1e0> g0: 000000000001c000 g1: 0000000000ef3954 g2: 0000000000000000 g3: 0000000000000001 g4: fff8400700a24d60 g5: fff8001fa5c10000 g6: fff8400700bc4000 g7: 0000000000000720 o0: 0000000000bc5058 o1: 0000000000000240 o2: 0000000000006000 o3: 0000000000001c00 o4: 0000000000000000 o5: 0000048000080000 sp: fff8400700bc6ab1 ret_pc: 00000000004609f0 RPC: <gup_huge_pmd+0x190/0x1e0> l0: fff8400700bc74fc l1: 0000000000020000 l2: 0000000000002000 l3: 0000000000000000 l4: fff8001f93250950 l5: 000000000113f800 l6: 0000000000000004 l7: 0000000000000000 i0: fff8400700ca46a0 i1: bd0000085e800453 i2: 000000026a0c4000 i3: 000000026a0c6000 i4: 0000000000000001 i5: fff800070c958de8 i6: fff8400700bc6b61 i7: 0000000000460dd0 I7: <gup_pud_range+0x170/0x1a0> Call Trace: [0000000000460dd0] gup_pud_range+0x170/0x1a0 [0000000000460e84] get_user_pages_fast+0x84/0x120 [00000000006f5a18] iov_iter_get_pages+0x98/0x240 [00000000005fa744] do_direct_IO+0xf64/0x1e00 [00000000005fbbc0] __blockdev_direct_IO+0x360/0x15a0 [00000000101f74fc] ext4_ind_direct_IO+0xdc/0x400 [ext4] [00000000101af690] ext4_ext_direct_IO+0x1d0/0x2c0 [ext4] [00000000101af86c] ext4_direct_IO+0xec/0x220 [ext4] [0000000000553bd4] generic_file_read_iter+0x114/0x140 [00000000005bdc2c] __vfs_read+0xac/0x100 [00000000005bf254] vfs_read+0x54/0x100 [00000000005bf368] SyS_pread64+0x68/0x80 Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2017-05-02 21:19:50 -07:00
..
alpha	alpha: fix copy_from_user()	2016-09-24 10:07:45 +02:00
arc	ARC: [arcompact] brown paper bag bug in unaligned access delay slot fixup	2017-02-14 15:22:50 -08:00
arm	ARM: OMAP2+: timer: add probe for clocksources	2017-05-02 21:19:47 -07:00
arm64	arm/arm64: KVM: Enforce unconditional flush to PoC when mapping to stage-2	2017-03-12 06:37:28 +01:00
avr32	avr32: off by one in at32_init_pio()	2016-10-07 15:23:45 +02:00
blackfin	net: smc91x: fix SMC accesses	2016-09-30 10:18:37 +02:00
c6x	c6x/ptrace: Remove useless PTRACE_SETREGSET implementation	2017-03-31 09:49:53 +02:00
cris	cris: Only build flash rescue image if CONFIG_ETRAX_AXISFLASHMAP is selected	2017-01-12 11:22:48 +01:00
frv	frv: fix clear_user()	2016-09-24 10:07:44 +02:00
h8300	h8300/ptrace: Fix incorrect register transfer count	2017-03-31 09:49:53 +02:00
hexagon	hexagon: fix strncpy_from_user() error return	2016-09-24 10:07:44 +02:00
ia64	ia64: copy_from_user() should zero the destination on access_ok() failure	2016-09-24 10:07:46 +02:00
m32r	m32r: fix __get_user()	2016-09-24 10:07:43 +02:00
m68k	m68k: Fix ndelay() macro	2016-12-15 08:49:23 -08:00
metag	metag/usercopy: Add missing fixups	2017-04-12 12:38:34 +02:00
microblaze	microblaze: fix copy_from_user()	2016-09-24 10:07:43 +02:00
mips	MIPS: Fix crash registers on non-crashing CPUs	2017-05-02 21:19:49 -07:00
mn10300	mn10300: copy_from_user() should zero on access_ok() failure...	2016-09-24 10:07:45 +02:00
nios2	nios2: reserve boot memory for device tree	2017-04-12 12:38:34 +02:00
openrisc	openrisc: fix the fix of copy_from_user()	2016-09-24 10:07:46 +02:00
parisc	parisc: Don't use BITS_PER_LONG in userspace-exported swab.h header	2017-02-01 08:30:53 +01:00
powerpc	powerpc/kprobe: Fix oops when kprobed on 'stdu' instruction	2017-04-27 09:09:33 +02:00
s390	s390/mm: fix CMMA vs KSM vs others	2017-04-27 09:09:32 +02:00
score	score: fix copy_from_user() and friends	2016-09-24 10:07:44 +02:00
sh	sh: fix copy_from_user()	2016-09-24 10:07:44 +02:00
sparc	sparc64: Fix kernel panic due to erroneous #ifdef surrounding pmd_write()	2017-05-02 21:19:50 -07:00
tile	tile/ptrace: Preserve previous registers for short regset write	2017-02-01 08:30:52 +01:00
um	um: Don't discard .text.exit section	2016-09-07 08:32:38 +02:00
unicore32
x86	xen/x86: don't lose event interrupts	2017-05-02 21:19:50 -07:00
xtensa	xtensa: move parse_tag_fdt out of #ifdef CONFIG_BLK_DEV_INITRD	2017-03-15 09:57:14 +08:00
.gitignore
Kconfig