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This pull request contains the following changes for UML:

Browse Source 
- Drop 32-bit checksum implementation and re-use it from arch/x86
 - String function cleanup
 - Fixes for -Wmissing-variable-declarations and -Wmissing-prototypes builds
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Merge tag 'uml-for-linus-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux

Pull UML updates from Richard Weinberger:

 - Drop 32-bit checksum implementation and re-use it from arch/x86

 - String function cleanup

 - Fixes for -Wmissing-variable-declarations and -Wmissing-prototypes
   builds

* tag 'uml-for-linus-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux:
  um: virt-pci: fix missing declaration warning
  um: Refactor deprecated strncpy to memcpy
  um: fix 3 instances of -Wmissing-prototypes
  um: port_kern: fix -Wmissing-variable-declarations
  uml: audio: fix -Wmissing-variable-declarations
  um: vector: refactor deprecated strncpy
  um: use obj-y to descend into arch/um/*/
  um: Hard-code the result of 'uname -s'
  um: Use the x86 checksum implementation on 32-bit
  asm-generic: current: Don't include thread-info.h if building asm
  um: Remove unsued extern declaration ldt_host_info()
  um: Fix hostaudio build errors
  um: Remove strlcpy usage
This commit is contained in:
Linus Torvalds 2023-09-04 11:32:21 -07:00
commit 68d76d4e7e
18 changed files with 23 additions and 245 deletions
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2
arch/um/Kbuild
View File

@ -1 +1,3 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-y += kernel/ drivers/ os-Linux/

9
arch/um/Makefile
View File

@ -18,15 +18,10 @@ else
endif
ARCH_DIR := arch/um
OS := $(shell uname -s)
# We require bash because the vmlinux link and loader script cpp use bash
# features.
SHELL := /bin/bash
core-y += $(ARCH_DIR)/kernel/ \
$(ARCH_DIR)/drivers/ \
$(ARCH_DIR)/os-$(OS)/
MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/shared/skas
HEADER_ARCH := $(SUBARCH)
@ -78,7 +73,7 @@ USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \
-idirafter $(objtree)/include -D__KERNEL__ -D__UM_HOST__
#This will adjust *FLAGS accordingly to the platform.
include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
include $(srctree)/$(ARCH_DIR)/Makefile-os-Linux
KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \
-I$(srctree)/$(HOST_DIR)/include/uapi \
@ -155,4 +150,4 @@ archclean:
@find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
-o -name '*.gcov' \) -type f -print | xargs rm -f
export HEADER_ARCH SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH
export HEADER_ARCH SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING DEV_NULL_PATH

1
arch/um/configs/i386_defconfig
View File

@ -34,6 +34,7 @@ CONFIG_TTY_CHAN=y
CONFIG_XTERM_CHAN=y
CONFIG_CON_CHAN="pts"
CONFIG_SSL_CHAN="pts"
CONFIG_SOUND=m
CONFIG_UML_SOUND=m
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y

1
arch/um/configs/x86_64_defconfig
View File

@ -32,6 +32,7 @@ CONFIG_TTY_CHAN=y
CONFIG_XTERM_CHAN=y
CONFIG_CON_CHAN="pts"
CONFIG_SSL_CHAN="pts"
CONFIG_SOUND=m
CONFIG_UML_SOUND=m
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y

16
arch/um/drivers/Kconfig
View File

@ -111,24 +111,14 @@ config SSL_CHAN
config UML_SOUND
tristate "Sound support"
depends on SOUND
select SOUND_OSS_CORE
help
This option enables UML sound support. If enabled, it will pull in
soundcore and the UML hostaudio relay, which acts as a intermediary
the UML hostaudio relay, which acts as a intermediary
between the host's dsp and mixer devices and the UML sound system.
It is safe to say 'Y' here.
config SOUND
tristate
default UML_SOUND
config SOUND_OSS_CORE
bool
default UML_SOUND
config HOSTAUDIO
tristate
default UML_SOUND
endmenu
menu "UML Network Devices"

2
arch/um/drivers/Makefile
View File

@ -54,7 +54,7 @@ obj-$(CONFIG_UML_NET) += net.o
obj-$(CONFIG_MCONSOLE) += mconsole.o
obj-$(CONFIG_MMAPPER) += mmapper_kern.o
obj-$(CONFIG_BLK_DEV_UBD) += ubd.o
obj-$(CONFIG_HOSTAUDIO) += hostaudio.o
obj-$(CONFIG_UML_SOUND) += hostaudio.o
obj-$(CONFIG_NULL_CHAN) += null.o
obj-$(CONFIG_PORT_CHAN) += port.o
obj-$(CONFIG_PTY_CHAN) += pty.o

2
arch/um/drivers/hostaudio_kern.c
View File

@ -310,7 +310,7 @@ static const struct file_operations hostmixer_fops = {
.release = hostmixer_release,
};
struct {
static struct {
int dev_audio;
int dev_mixer;
} module_data;

2
arch/um/drivers/port_kern.c
View File

@ -144,7 +144,7 @@ static void port_work_proc(struct work_struct *unused)
local_irq_restore(flags);
}
DECLARE_WORK(port_work, port_work_proc);
static DECLARE_WORK(port_work, port_work_proc);
static irqreturn_t port_interrupt(int irq, void *data)
{

2
arch/um/drivers/slirp_kern.c
View File

@ -15,7 +15,7 @@ struct slirp_init {
struct arg_list_dummy_wrapper argw; /* XXX should be simpler... */
};
void slirp_init(struct net_device *dev, void *data)
static void slirp_init(struct net_device *dev, void *data)
{
struct uml_net_private *private;
struct slirp_data *spri;

2
arch/um/drivers/virt-pci.c
View File

@ -544,6 +544,7 @@ static void um_pci_irq_vq_cb(struct virtqueue *vq)
}
}
#ifdef CONFIG_OF
/* Copied from arch/x86/kernel/devicetree.c */
struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
{
@ -562,6 +563,7 @@ struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
}
return NULL;
}
#endif
static int um_pci_init_vqs(struct um_pci_device *dev)
{

1
arch/um/drivers/xterm_kern.c
View File

@ -9,6 +9,7 @@
#include <asm/irq.h>
#include <irq_kern.h>
#include <os.h>
#include "xterm.h"
struct xterm_wait {
struct completion ready;

1
arch/um/include/shared/irq_kern.h
View File

@ -76,4 +76,5 @@ static inline bool um_irq_timetravel_handler_used(void)
}
void um_free_irq(int irq, void *dev_id);
void free_irqs(void);
#endif

2
arch/um/kernel/irq.c
View File

@ -23,8 +23,6 @@
#include <linux/time-internal.h>
extern void free_irqs(void);
/* When epoll triggers we do not know why it did so
* we can also have different IRQs for read and write.
* This is why we keep a small irq_reg array for each fd -

5
arch/x86/um/Makefile
View File

@ -13,15 +13,16 @@ obj-y = bugs_$(BITS).o delay.o fault.o ldt.o \
ptrace_$(BITS).o ptrace_user.o setjmp_$(BITS).o signal.o \
stub_$(BITS).o stub_segv.o \
sys_call_table_$(BITS).o sysrq_$(BITS).o tls_$(BITS).o \
mem_$(BITS).o subarch.o os-$(OS)/
mem_$(BITS).o subarch.o os-Linux/
ifeq ($(CONFIG_X86_32),y)
obj-y += checksum_32.o syscalls_32.o
obj-y += syscalls_32.o
obj-$(CONFIG_ELF_CORE) += elfcore.o
subarch-y = ../lib/string_32.o ../lib/atomic64_32.o ../lib/atomic64_cx8_32.o
subarch-y += ../lib/cmpxchg8b_emu.o ../lib/atomic64_386_32.o
subarch-y += ../lib/checksum_32.o
subarch-y += ../kernel/sys_ia32.o
else

2
arch/x86/um/asm/mm_context.h
View File

@ -11,8 +11,6 @@
#include <linux/mutex.h>
#include <asm/ldt.h>
extern void ldt_host_info(void);
#define LDT_PAGES_MAX \
((LDT_ENTRIES * LDT_ENTRY_SIZE)/PAGE_SIZE)
#define LDT_ENTRIES_PER_PAGE \

214
arch/x86/um/checksum_32.S
View File

@ -1,214 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* INET An implementation of the TCP/IP protocol suite for the LINUX
* operating system. INET is implemented using the BSD Socket
* interface as the means of communication with the user level.
*
* IP/TCP/UDP checksumming routines
*
* Authors: Jorge Cwik, <jorge@laser.satlink.net>
* Arnt Gulbrandsen, <agulbra@nvg.unit.no>
* Tom May, <ftom@netcom.com>
* Pentium Pro/II routines:
* Alexander Kjeldaas <astor@guardian.no>
* Finn Arne Gangstad <finnag@guardian.no>
* Lots of code moved from tcp.c and ip.c; see those files
* for more names.
*
* Changes: Ingo Molnar, converted csum_partial_copy() to 2.1 exception
* handling.
* Andi Kleen, add zeroing on error
* converted to pure assembler
*/
#include <asm/errno.h>
#include <asm/asm.h>
#include <asm/export.h>
/*
* computes a partial checksum, e.g. for TCP/UDP fragments
*/
/*
unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum)
*/
.text
.align 4
.globl csum_partial
#ifndef CONFIG_X86_USE_PPRO_CHECKSUM
/*
* Experiments with Ethernet and SLIP connections show that buff
* is aligned on either a 2-byte or 4-byte boundary. We get at
* least a twofold speedup on 486 and Pentium if it is 4-byte aligned.
* Fortunately, it is easy to convert 2-byte alignment to 4-byte
* alignment for the unrolled loop.
*/
csum_partial:
pushl %esi
pushl %ebx
movl 20(%esp),%eax # Function arg: unsigned int sum
movl 16(%esp),%ecx # Function arg: int len
movl 12(%esp),%esi # Function arg: unsigned char *buff
testl $2, %esi # Check alignment.
jz 2f # Jump if alignment is ok.
subl $2, %ecx # Alignment uses up two bytes.
jae 1f # Jump if we had at least two bytes.
addl $2, %ecx # ecx was < 2. Deal with it.
jmp 4f
1: movw (%esi), %bx
addl $2, %esi
addw %bx, %ax
adcl $0, %eax
2:
movl %ecx, %edx
shrl $5, %ecx
jz 2f
testl %esi, %esi
1: movl (%esi), %ebx
adcl %ebx, %eax
movl 4(%esi), %ebx
adcl %ebx, %eax
movl 8(%esi), %ebx
adcl %ebx, %eax
movl 12(%esi), %ebx
adcl %ebx, %eax
movl 16(%esi), %ebx
adcl %ebx, %eax
movl 20(%esi), %ebx
adcl %ebx, %eax
movl 24(%esi), %ebx
adcl %ebx, %eax
movl 28(%esi), %ebx
adcl %ebx, %eax
lea 32(%esi), %esi
dec %ecx
jne 1b
adcl $0, %eax
2: movl %edx, %ecx
andl $0x1c, %edx
je 4f
shrl $2, %edx # This clears CF
3: adcl (%esi), %eax
lea 4(%esi), %esi
dec %edx
jne 3b
adcl $0, %eax
4: andl $3, %ecx
jz 7f
cmpl $2, %ecx
jb 5f
movw (%esi),%cx
leal 2(%esi),%esi
je 6f
shll $16,%ecx
5: movb (%esi),%cl
6: addl %ecx,%eax
adcl $0, %eax
7:
popl %ebx
popl %esi
RET
#else
/* Version for PentiumII/PPro */
csum_partial:
pushl %esi
pushl %ebx
movl 20(%esp),%eax # Function arg: unsigned int sum
movl 16(%esp),%ecx # Function arg: int len
movl 12(%esp),%esi # Function arg: const unsigned char *buf
testl $2, %esi
jnz 30f
10:
movl %ecx, %edx
movl %ecx, %ebx
andl $0x7c, %ebx
shrl $7, %ecx
addl %ebx,%esi
shrl $2, %ebx
negl %ebx
lea 45f(%ebx,%ebx,2), %ebx
testl %esi, %esi
jmp *%ebx
# Handle 2-byte-aligned regions
20: addw (%esi), %ax
lea 2(%esi), %esi
adcl $0, %eax
jmp 10b
30: subl $2, %ecx
ja 20b
je 32f
movzbl (%esi),%ebx # csumming 1 byte, 2-aligned
addl %ebx, %eax
adcl $0, %eax
jmp 80f
32:
addw (%esi), %ax # csumming 2 bytes, 2-aligned
adcl $0, %eax
jmp 80f
40:
addl -128(%esi), %eax
adcl -124(%esi), %eax
adcl -120(%esi), %eax
adcl -116(%esi), %eax
adcl -112(%esi), %eax
adcl -108(%esi), %eax
adcl -104(%esi), %eax
adcl -100(%esi), %eax
adcl -96(%esi), %eax
adcl -92(%esi), %eax
adcl -88(%esi), %eax
adcl -84(%esi), %eax
adcl -80(%esi), %eax
adcl -76(%esi), %eax
adcl -72(%esi), %eax
adcl -68(%esi), %eax
adcl -64(%esi), %eax
adcl -60(%esi), %eax
adcl -56(%esi), %eax
adcl -52(%esi), %eax
adcl -48(%esi), %eax
adcl -44(%esi), %eax
adcl -40(%esi), %eax
adcl -36(%esi), %eax
adcl -32(%esi), %eax
adcl -28(%esi), %eax
adcl -24(%esi), %eax
adcl -20(%esi), %eax
adcl -16(%esi), %eax
adcl -12(%esi), %eax
adcl -8(%esi), %eax
adcl -4(%esi), %eax
45:
lea 128(%esi), %esi
adcl $0, %eax
dec %ecx
jge 40b
movl %edx, %ecx
50: andl $3, %ecx
jz 80f
# Handle the last 1-3 bytes without jumping
notl %ecx # 1->2, 2->1, 3->0, higher bits are masked
movl $0xffffff,%ebx # by the shll and shrl instructions
shll $3,%ecx
shrl %cl,%ebx
andl -128(%esi),%ebx # esi is 4-aligned so should be ok
addl %ebx,%eax
adcl $0,%eax
80:
popl %ebx
popl %esi
RET
#endif
EXPORT_SYMBOL(csum_partial)

2
include/asm-generic/current.h
View File

@ -2,9 +2,11 @@
#ifndef __ASM_GENERIC_CURRENT_H
#define __ASM_GENERIC_CURRENT_H
#ifndef __ASSEMBLY__
#include <linux/thread_info.h>
#define get_current() (current_thread_info()->task)
#define current get_current()
#endif
#endif /* __ASM_GENERIC_CURRENT_H */

2
sound/Kconfig
View File

@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
menuconfig SOUND
tristate "Sound card support"
depends on HAS_IOMEM
depends on HAS_IOMEM || UML
help
If you have a sound card in your computer, i.e. if it can say more
than an occasional beep, say Y.