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authorLinus Torvalds <torvalds@linux-foundation.org>2014-06-19 07:51:45 -1000
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-19 07:51:45 -1000
commit92b944170d67fec75ec20e1362fd8ecff078e7d1 (patch)
tree51fa38b11a60b830fac3e2c24c10a61b132e1951 /arch
parentc4222e4635c6d6a689bf69e982f19c9d1ba261e1 (diff)
parente3a920afc3482e954834a4ed95908c4bc5e4c000 (diff)
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas: "These are primarily bug fixes with a performance improvement patch for the GHASH crypto algorithm (which went in during this merging window) and dts/defconfig/Kconfig updates. - ftrace_return_addr() macro fix for arm (introduced earlier via the arm64 tree) - stack alignment exception entry code fix - GHASH crypto algorithm fix and performance improvement - CMA buffer limited to 32-bit (until a better way to describe the system topology in DT) - UAPI sigcontext.h build fix - __kernel_old_{gid,uid}_t definitions fix (affecting 32-bit LTP) - ptrace fixes (kernel fault and 32-bit arm core dump) - pte_mknotpresent() fix - dts updates (APM SoC) - defconfig and Kconfig update" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: mm: remove broken &= operator from pmd_mknotpresent arm64: fix build error in sigcontext.h arm64: dts: Add more serial port nodes in APM X-Gene device tree arm64/dma: Removing ARCH_HAS_DMA_GET_REQUIRED_MASK macro arm64: ptrace: fix empty registers set in prstatus of aarch32 process core arm64: uid16: fix __kernel_old_{gid,uid}_t definitions arm64: ptrace: change fs when passing kernel pointer to regset code arm64: Limit the CMA buffer to 32-bit if ZONE_DMA arm/ftrace: fix ftrace_return_addr() to ftrace_return_address() arm64/crypto: improve performance of GHASH algorithm arm64/crypto: fix data corruption bug in GHASH algorithm arm64: defconfig update for LTP arm64: ftrace: Fix comment typo 'CONFIG_FUNCTION_GRAPH_FP_TEST' arm64: add ARCH_HAS_OPP to allow enabling OPP library arm64: restore alphabetic order in Kconfig arm64: Bug fix in stack alignment exception
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/include/asm/ftrace.h2
-rw-r--r--arch/arm64/Kconfig3
-rw-r--r--arch/arm64/boot/dts/apm-mustang.dts4
-rw-r--r--arch/arm64/boot/dts/apm-storm.dtsi36
-rw-r--r--arch/arm64/configs/defconfig15
-rw-r--r--arch/arm64/crypto/ghash-ce-core.S92
-rw-r--r--arch/arm64/crypto/ghash-ce-glue.c5
-rw-r--r--arch/arm64/include/asm/Kbuild1
-rw-r--r--arch/arm64/include/asm/dma-mapping.h2
-rw-r--r--arch/arm64/include/asm/pgtable.h2
-rw-r--r--arch/arm64/include/uapi/asm/posix_types.h10
-rw-r--r--arch/arm64/include/uapi/asm/sigcontext.h2
-rw-r--r--arch/arm64/kernel/entry-ftrace.S2
-rw-r--r--arch/arm64/kernel/entry.S1
-rw-r--r--arch/arm64/kernel/ptrace.c32
-rw-r--r--arch/arm64/mm/init.c10
16 files changed, 142 insertions, 77 deletions
diff --git a/arch/arm/include/asm/ftrace.h b/arch/arm/include/asm/ftrace.h
index eb577f4f5f70..39eb16b0066f 100644
--- a/arch/arm/include/asm/ftrace.h
+++ b/arch/arm/include/asm/ftrace.h
@@ -52,7 +52,7 @@ extern inline void *return_address(unsigned int level)
#endif
-#define ftrace_return_addr(n) return_address(n)
+#define ftrace_return_address(n) return_address(n)
#endif /* ifndef __ASSEMBLY__ */
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 7295419165e1..a474de346be6 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1,8 +1,9 @@
config ARM64
def_bool y
select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
- select ARCH_USE_CMPXCHG_LOCKREF
+ select ARCH_HAS_OPP
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
+ select ARCH_USE_CMPXCHG_LOCKREF
select ARCH_WANT_OPTIONAL_GPIOLIB
select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
select ARCH_WANT_FRAME_POINTERS
diff --git a/arch/arm64/boot/dts/apm-mustang.dts b/arch/arm64/boot/dts/apm-mustang.dts
index 1247ca1200b1..6541962f5d70 100644
--- a/arch/arm64/boot/dts/apm-mustang.dts
+++ b/arch/arm64/boot/dts/apm-mustang.dts
@@ -24,3 +24,7 @@
reg = < 0x1 0x00000000 0x0 0x80000000 >; /* Updated by bootloader */
};
};
+
+&serial0 {
+ status = "ok";
+};
diff --git a/arch/arm64/boot/dts/apm-storm.dtsi b/arch/arm64/boot/dts/apm-storm.dtsi
index c5f0a47a1375..40aa96ce13c4 100644
--- a/arch/arm64/boot/dts/apm-storm.dtsi
+++ b/arch/arm64/boot/dts/apm-storm.dtsi
@@ -273,8 +273,9 @@
};
serial0: serial@1c020000 {
+ status = "disabled";
device_type = "serial";
- compatible = "ns16550";
+ compatible = "ns16550a";
reg = <0 0x1c020000 0x0 0x1000>;
reg-shift = <2>;
clock-frequency = <10000000>; /* Updated by bootloader */
@@ -282,6 +283,39 @@
interrupts = <0x0 0x4c 0x4>;
};
+ serial1: serial@1c021000 {
+ status = "disabled";
+ device_type = "serial";
+ compatible = "ns16550a";
+ reg = <0 0x1c021000 0x0 0x1000>;
+ reg-shift = <2>;
+ clock-frequency = <10000000>; /* Updated by bootloader */
+ interrupt-parent = <&gic>;
+ interrupts = <0x0 0x4d 0x4>;
+ };
+
+ serial2: serial@1c022000 {
+ status = "disabled";
+ device_type = "serial";
+ compatible = "ns16550a";
+ reg = <0 0x1c022000 0x0 0x1000>;
+ reg-shift = <2>;
+ clock-frequency = <10000000>; /* Updated by bootloader */
+ interrupt-parent = <&gic>;
+ interrupts = <0x0 0x4e 0x4>;
+ };
+
+ serial3: serial@1c023000 {
+ status = "disabled";
+ device_type = "serial";
+ compatible = "ns16550a";
+ reg = <0 0x1c023000 0x0 0x1000>;
+ reg-shift = <2>;
+ clock-frequency = <10000000>; /* Updated by bootloader */
+ interrupt-parent = <&gic>;
+ interrupts = <0x0 0x4f 0x4>;
+ };
+
phy1: phy@1f21a000 {
compatible = "apm,xgene-phy";
reg = <0x0 0x1f21a000 0x0 0x100>;
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 157e1d8d9a47..3421f316f5dc 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -6,9 +6,18 @@ CONFIG_NO_HZ_IDLE=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_BSD_PROCESS_ACCT_V3=y
+CONFIG_TASKSTATS=y
+CONFIG_TASK_DELAY_ACCT=y
+CONFIG_TASK_XACCT=y
+CONFIG_TASK_IO_ACCOUNTING=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=14
+CONFIG_RESOURCE_COUNTERS=y
+CONFIG_MEMCG=y
+CONFIG_MEMCG_SWAP=y
+CONFIG_MEMCG_KMEM=y
+CONFIG_CGROUP_HUGETLB=y
# CONFIG_UTS_NS is not set
# CONFIG_IPC_NS is not set
# CONFIG_PID_NS is not set
@@ -27,6 +36,7 @@ CONFIG_ARCH_VEXPRESS=y
CONFIG_ARCH_XGENE=y
CONFIG_SMP=y
CONFIG_PREEMPT=y
+CONFIG_KSM=y
CONFIG_TRANSPARENT_HUGEPAGE=y
CONFIG_CMA=y
CONFIG_CMDLINE="console=ttyAMA0"
@@ -45,6 +55,7 @@ CONFIG_IP_PNP_BOOTP=y
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_DEVTMPFS=y
CONFIG_DMA_CMA=y
+CONFIG_BLK_DEV_LOOP=y
CONFIG_VIRTIO_BLK=y
# CONFIG_SCSI_PROC_FS is not set
CONFIG_BLK_DEV_SD=y
@@ -53,6 +64,7 @@ CONFIG_ATA=y
CONFIG_PATA_PLATFORM=y
CONFIG_PATA_OF_PLATFORM=y
CONFIG_NETDEVICES=y
+CONFIG_TUN=y
CONFIG_SMC91X=y
CONFIG_SMSC911X=y
# CONFIG_WLAN is not set
@@ -85,6 +97,8 @@ CONFIG_EXT3_FS=y
# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
# CONFIG_EXT3_FS_XATTR is not set
CONFIG_EXT4_FS=y
+CONFIG_FANOTIFY=y
+CONFIG_FANOTIFY_ACCESS_PERMISSIONS=y
CONFIG_FUSE_FS=y
CONFIG_CUSE=y
CONFIG_VFAT_FS=y
@@ -104,6 +118,7 @@ CONFIG_DEBUG_KERNEL=y
CONFIG_LOCKUP_DETECTOR=y
# CONFIG_SCHED_DEBUG is not set
# CONFIG_FTRACE is not set
+CONFIG_SECURITY=y
CONFIG_CRYPTO_ANSI_CPRNG=y
CONFIG_ARM64_CRYPTO=y
CONFIG_CRYPTO_SHA1_ARM64_CE=y
diff --git a/arch/arm64/crypto/ghash-ce-core.S b/arch/arm64/crypto/ghash-ce-core.S
index b9e6eaf41c9b..dc457015884e 100644
--- a/arch/arm64/crypto/ghash-ce-core.S
+++ b/arch/arm64/crypto/ghash-ce-core.S
@@ -3,14 +3,6 @@
*
* Copyright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
*
- * Based on arch/x86/crypto/ghash-pmullni-intel_asm.S
- *
- * Copyright (c) 2009 Intel Corp.
- * Author: Huang Ying <ying.huang@intel.com>
- * Vinodh Gopal
- * Erdinc Ozturk
- * Deniz Karakoyunlu
- *
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
@@ -19,13 +11,15 @@
#include <linux/linkage.h>
#include <asm/assembler.h>
- DATA .req v0
- SHASH .req v1
- IN1 .req v2
+ SHASH .req v0
+ SHASH2 .req v1
T1 .req v2
T2 .req v3
- T3 .req v4
- VZR .req v5
+ MASK .req v4
+ XL .req v5
+ XM .req v6
+ XH .req v7
+ IN1 .req v7
.text
.arch armv8-a+crypto
@@ -35,61 +29,51 @@
* struct ghash_key const *k, const char *head)
*/
ENTRY(pmull_ghash_update)
- ld1 {DATA.16b}, [x1]
ld1 {SHASH.16b}, [x3]
- eor VZR.16b, VZR.16b, VZR.16b
+ ld1 {XL.16b}, [x1]
+ movi MASK.16b, #0xe1
+ ext SHASH2.16b, SHASH.16b, SHASH.16b, #8
+ shl MASK.2d, MASK.2d, #57
+ eor SHASH2.16b, SHASH2.16b, SHASH.16b
/* do the head block first, if supplied */
cbz x4, 0f
- ld1 {IN1.2d}, [x4]
+ ld1 {T1.2d}, [x4]
b 1f
-0: ld1 {IN1.2d}, [x2], #16
+0: ld1 {T1.2d}, [x2], #16
sub w0, w0, #1
-1: ext IN1.16b, IN1.16b, IN1.16b, #8
-CPU_LE( rev64 IN1.16b, IN1.16b )
- eor DATA.16b, DATA.16b, IN1.16b
- /* multiply DATA by SHASH in GF(2^128) */
- ext T2.16b, DATA.16b, DATA.16b, #8
- ext T3.16b, SHASH.16b, SHASH.16b, #8
- eor T2.16b, T2.16b, DATA.16b
- eor T3.16b, T3.16b, SHASH.16b
+1: /* multiply XL by SHASH in GF(2^128) */
+CPU_LE( rev64 T1.16b, T1.16b )
- pmull2 T1.1q, SHASH.2d, DATA.2d // a1 * b1
- pmull DATA.1q, SHASH.1d, DATA.1d // a0 * b0
- pmull T2.1q, T2.1d, T3.1d // (a1 + a0)(b1 + b0)
- eor T2.16b, T2.16b, T1.16b // (a0 * b1) + (a1 * b0)
- eor T2.16b, T2.16b, DATA.16b
+ ext T2.16b, XL.16b, XL.16b, #8
+ ext IN1.16b, T1.16b, T1.16b, #8
+ eor T1.16b, T1.16b, T2.16b
+ eor XL.16b, XL.16b, IN1.16b
- ext T3.16b, VZR.16b, T2.16b, #8
- ext T2.16b, T2.16b, VZR.16b, #8
- eor DATA.16b, DATA.16b, T3.16b
- eor T1.16b, T1.16b, T2.16b // <T1:DATA> is result of
- // carry-less multiplication
+ pmull2 XH.1q, SHASH.2d, XL.2d // a1 * b1
+ eor T1.16b, T1.16b, XL.16b
+ pmull XL.1q, SHASH.1d, XL.1d // a0 * b0
+ pmull XM.1q, SHASH2.1d, T1.1d // (a1 + a0)(b1 + b0)
- /* first phase of the reduction */
- shl T3.2d, DATA.2d, #1
- eor T3.16b, T3.16b, DATA.16b
- shl T3.2d, T3.2d, #5
- eor T3.16b, T3.16b, DATA.16b
- shl T3.2d, T3.2d, #57
- ext T2.16b, VZR.16b, T3.16b, #8
- ext T3.16b, T3.16b, VZR.16b, #8
- eor DATA.16b, DATA.16b, T2.16b
- eor T1.16b, T1.16b, T3.16b
+ ext T1.16b, XL.16b, XH.16b, #8
+ eor T2.16b, XL.16b, XH.16b
+ eor XM.16b, XM.16b, T1.16b
+ eor XM.16b, XM.16b, T2.16b
+ pmull T2.1q, XL.1d, MASK.1d
- /* second phase of the reduction */
- ushr T2.2d, DATA.2d, #5
- eor T2.16b, T2.16b, DATA.16b
- ushr T2.2d, T2.2d, #1
- eor T2.16b, T2.16b, DATA.16b
- ushr T2.2d, T2.2d, #1
- eor T1.16b, T1.16b, T2.16b
- eor DATA.16b, DATA.16b, T1.16b
+ mov XH.d[0], XM.d[1]
+ mov XM.d[1], XL.d[0]
+
+ eor XL.16b, XM.16b, T2.16b
+ ext T2.16b, XL.16b, XL.16b, #8
+ pmull XL.1q, XL.1d, MASK.1d
+ eor T2.16b, T2.16b, XH.16b
+ eor XL.16b, XL.16b, T2.16b
cbnz w0, 0b
- st1 {DATA.16b}, [x1]
+ st1 {XL.16b}, [x1]
ret
ENDPROC(pmull_ghash_update)
diff --git a/arch/arm64/crypto/ghash-ce-glue.c b/arch/arm64/crypto/ghash-ce-glue.c
index b92baf3f68c7..833ec1e3f3e9 100644
--- a/arch/arm64/crypto/ghash-ce-glue.c
+++ b/arch/arm64/crypto/ghash-ce-glue.c
@@ -67,11 +67,12 @@ static int ghash_update(struct shash_desc *desc, const u8 *src,
blocks = len / GHASH_BLOCK_SIZE;
len %= GHASH_BLOCK_SIZE;
- kernel_neon_begin_partial(6);
+ kernel_neon_begin_partial(8);
pmull_ghash_update(blocks, ctx->digest, src, key,
partial ? ctx->buf : NULL);
kernel_neon_end();
src += blocks * GHASH_BLOCK_SIZE;
+ partial = 0;
}
if (len)
memcpy(ctx->buf + partial, src, len);
@@ -88,7 +89,7 @@ static int ghash_final(struct shash_desc *desc, u8 *dst)
memset(ctx->buf + partial, 0, GHASH_BLOCK_SIZE - partial);
- kernel_neon_begin_partial(6);
+ kernel_neon_begin_partial(8);
pmull_ghash_update(1, ctx->digest, ctx->buf, key, NULL);
kernel_neon_end();
}
diff --git a/arch/arm64/include/asm/Kbuild b/arch/arm64/include/asm/Kbuild
index 42c7eecd2bb6..0b3fcf86e6ba 100644
--- a/arch/arm64/include/asm/Kbuild
+++ b/arch/arm64/include/asm/Kbuild
@@ -30,7 +30,6 @@ generic-y += msgbuf.h
generic-y += mutex.h
generic-y += pci.h
generic-y += poll.h
-generic-y += posix_types.h
generic-y += preempt.h
generic-y += resource.h
generic-y += rwsem.h
diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h
index 3a4572ec3273..dc82e52acdb3 100644
--- a/arch/arm64/include/asm/dma-mapping.h
+++ b/arch/arm64/include/asm/dma-mapping.h
@@ -26,8 +26,6 @@
#include <xen/xen.h>
#include <asm/xen/hypervisor.h>
-#define ARCH_HAS_DMA_GET_REQUIRED_MASK
-
#define DMA_ERROR_CODE (~(dma_addr_t)0)
extern struct dma_map_ops *dma_ops;
extern struct dma_map_ops coherent_swiotlb_dma_ops;
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 598cc384fc1c..579702086488 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -246,7 +246,7 @@ static inline pmd_t pte_pmd(pte_t pte)
#define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd)))
#define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
#define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd)))
-#define pmd_mknotpresent(pmd) (__pmd(pmd_val(pmd) &= ~PMD_TYPE_MASK))
+#define pmd_mknotpresent(pmd) (__pmd(pmd_val(pmd) & ~PMD_TYPE_MASK))
#define __HAVE_ARCH_PMD_WRITE
#define pmd_write(pmd) pte_write(pmd_pte(pmd))
diff --git a/arch/arm64/include/uapi/asm/posix_types.h b/arch/arm64/include/uapi/asm/posix_types.h
new file mode 100644
index 000000000000..7985ff60ca3f
--- /dev/null
+++ b/arch/arm64/include/uapi/asm/posix_types.h
@@ -0,0 +1,10 @@
+#ifndef __ASM_POSIX_TYPES_H
+#define __ASM_POSIX_TYPES_H
+
+typedef unsigned short __kernel_old_uid_t;
+typedef unsigned short __kernel_old_gid_t;
+#define __kernel_old_uid_t __kernel_old_uid_t
+
+#include <asm-generic/posix_types.h>
+
+#endif /* __ASM_POSIX_TYPES_H */
diff --git a/arch/arm64/include/uapi/asm/sigcontext.h b/arch/arm64/include/uapi/asm/sigcontext.h
index b72cf405b3fe..ee469be1ae1d 100644
--- a/arch/arm64/include/uapi/asm/sigcontext.h
+++ b/arch/arm64/include/uapi/asm/sigcontext.h
@@ -58,7 +58,7 @@ struct fpsimd_context {
struct esr_context {
struct _aarch64_ctx head;
- u64 esr;
+ __u64 esr;
};
#endif /* _UAPI__ASM_SIGCONTEXT_H */
diff --git a/arch/arm64/kernel/entry-ftrace.S b/arch/arm64/kernel/entry-ftrace.S
index b051871f2965..aa5f9fcbf9ee 100644
--- a/arch/arm64/kernel/entry-ftrace.S
+++ b/arch/arm64/kernel/entry-ftrace.S
@@ -205,7 +205,7 @@ ENDPROC(ftrace_graph_caller)
*
* Run ftrace_return_to_handler() before going back to parent.
* @fp is checked against the value passed by ftrace_graph_caller()
- * only when CONFIG_FUNCTION_GRAPH_FP_TEST is enabled.
+ * only when CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST is enabled.
*/
ENTRY(return_to_handler)
str x0, [sp, #-16]!
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index bf017f4ffb4f..9ce04ba6bcb0 100644
--- a/arch/arm64/kernel/entry.S
+++ b/arch/arm64/kernel/entry.S
@@ -279,7 +279,6 @@ el1_sp_pc:
*/
mrs x0, far_el1
enable_dbg
- mov x1, x25
mov x2, sp
b do_sp_pc_abort
el1_undef:
diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c
index 3e926b9c0641..9fde010c945f 100644
--- a/arch/arm64/kernel/ptrace.c
+++ b/arch/arm64/kernel/ptrace.c
@@ -655,11 +655,16 @@ static int compat_gpr_get(struct task_struct *target,
reg = task_pt_regs(target)->regs[idx];
}
- ret = copy_to_user(ubuf, &reg, sizeof(reg));
- if (ret)
- break;
-
- ubuf += sizeof(reg);
+ if (kbuf) {
+ memcpy(kbuf, &reg, sizeof(reg));
+ kbuf += sizeof(reg);
+ } else {
+ ret = copy_to_user(ubuf, &reg, sizeof(reg));
+ if (ret)
+ break;
+
+ ubuf += sizeof(reg);
+ }
}
return ret;
@@ -689,11 +694,16 @@ static int compat_gpr_set(struct task_struct *target,
unsigned int idx = start + i;
compat_ulong_t reg;
- ret = copy_from_user(&reg, ubuf, sizeof(reg));
- if (ret)
- return ret;
+ if (kbuf) {
+ memcpy(&reg, kbuf, sizeof(reg));
+ kbuf += sizeof(reg);
+ } else {
+ ret = copy_from_user(&reg, ubuf, sizeof(reg));
+ if (ret)
+ return ret;
- ubuf += sizeof(reg);
+ ubuf += sizeof(reg);
+ }
switch (idx) {
case 15:
@@ -827,6 +837,7 @@ static int compat_ptrace_write_user(struct task_struct *tsk, compat_ulong_t off,
compat_ulong_t val)
{
int ret;
+ mm_segment_t old_fs = get_fs();
if (off & 3 || off >= COMPAT_USER_SZ)
return -EIO;
@@ -834,10 +845,13 @@ static int compat_ptrace_write_user(struct task_struct *tsk, compat_ulong_t off,
if (off >= sizeof(compat_elf_gregset_t))
return 0;
+ set_fs(KERNEL_DS);
ret = copy_regset_from_user(tsk, &user_aarch32_view,
REGSET_COMPAT_GPR, off,
sizeof(compat_ulong_t),
&val);
+ set_fs(old_fs);
+
return ret;
}
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 091d428d64ac..f43db8a69262 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -71,7 +71,7 @@ static void __init zone_sizes_init(unsigned long min, unsigned long max)
/* 4GB maximum for 32-bit only capable devices */
if (IS_ENABLED(CONFIG_ZONE_DMA)) {
unsigned long max_dma_phys =
- (unsigned long)dma_to_phys(NULL, DMA_BIT_MASK(32) + 1);
+ (unsigned long)(dma_to_phys(NULL, DMA_BIT_MASK(32)) + 1);
max_dma = max(min, min(max, max_dma_phys >> PAGE_SHIFT));
zone_size[ZONE_DMA] = max_dma - min;
}
@@ -126,6 +126,8 @@ static void arm64_memory_present(void)
void __init arm64_memblock_init(void)
{
+ phys_addr_t dma_phys_limit = 0;
+
/* Register the kernel text, kernel data and initrd with memblock */
memblock_reserve(__pa(_text), _end - _text);
#ifdef CONFIG_BLK_DEV_INITRD
@@ -141,7 +143,11 @@ void __init arm64_memblock_init(void)
memblock_reserve(__pa(idmap_pg_dir), IDMAP_DIR_SIZE);
early_init_fdt_scan_reserved_mem();
- dma_contiguous_reserve(0);
+
+ /* 4GB maximum for 32-bit only capable devices */
+ if (IS_ENABLED(CONFIG_ZONE_DMA))
+ dma_phys_limit = dma_to_phys(NULL, DMA_BIT_MASK(32)) + 1;
+ dma_contiguous_reserve(dma_phys_limit);
memblock_allow_resize();
memblock_dump_all();