Merge branch 'for-linus-4.2-rc1' of git://git.kernel.org/pub/scm/linu…

…x/kernel/git/rw/uml

Pull UML updates from Richard Weinberger:

 - remove hppfs ("HonePot ProcFS")

 - initial support for musl libc

 - uaccess cleanup

 - random cleanups and bug fixes all over the place

* 'for-linus-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: (21 commits)
  um: Don't pollute kernel namespace with uapi
  um: Include sys/types.h for makedev(), major(), minor()
  um: Do not use stdin and stdout identifiers for struct members
  um: Do not use __ptr_t type for stack_t's .ss pointer
  um: Fix mconsole dependency
  um: Handle tracehook_report_syscall_entry() result
  um: Remove copy&paste code from init.h
  um: Stop abusing __KERNEL__
  um: Catch unprotected user memory access
  um: Fix warning in setup_signal_stack_si()
  um: Rework uaccess code
  um: Add uaccess.h to ldt.c
  um: Add uaccess.h to syscalls_64.c
  um: Add asm/elf.h to vma.c
  um: Cleanup mem_32/64.c headers
  um: Remove hppfs
  um: Move syscall() declaration into os.h
  um: kernel: ksyms: Export symbol syscall() for fixing modpost issue
  um/os-Linux: Use char[] for syscall_stub declarations
  um: Use char[] for linker script address declarations
  ...

arch/um/Kconfig.um

@@ -44,23 +44,9 @@ config HOSTFS
           If you'd like to be able to work with files stored on the host,
           say Y or M here; otherwise say N.
 
-config HPPFS
-	tristate "HoneyPot ProcFS"
-	depends on PROC_FS
-	help
-	  hppfs (HoneyPot ProcFS) is a filesystem which allows UML /proc
-	  entries to be overridden, removed, or fabricated from the host.
-	  Its purpose is to allow a UML to appear to be a physical machine
-	  by removing or changing anything in /proc which gives away the
-	  identity of a UML.
-
-	  See <http://user-mode-linux.sf.net/old/hppfs.html> for more information.
-
-	  You only need this if you are setting up a UML honeypot.  Otherwise,
-	  it is safe to say 'N' here.
-
 config MCONSOLE
 	bool "Management console"
+	depends on PROC_FS
 	default y
 	help
           The user mode linux management console is a low-level interface to

arch/um/Makefile

@@ -68,9 +68,10 @@ KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ \
 
 KBUILD_AFLAGS += $(ARCH_INCLUDE)
 
-USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
-	$(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
-	$(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64 -idirafter include
+USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \
+		$(ARCH_INCLUDE) $(MODE_INCLUDE) $(filter -I%,$(CFLAGS)) \
+		-D_FILE_OFFSET_BITS=64 -idirafter include \
+		-D__KERNEL__ -D__UM_HOST__
 
 #This will adjust *FLAGS accordingly to the platform.
 include $(ARCH_DIR)/Makefile-os-$(OS)

arch/um/drivers/harddog_user.c

@@ -9,20 +9,20 @@
 #include <os.h>
 
 struct dog_data {
-	int stdin;
-	int stdout;
+	int stdin_fd;
+	int stdout_fd;
 	int close_me[2];
 };
 
 static void pre_exec(void *d)
 {
 	struct dog_data *data = d;
 
-	dup2(data->stdin, 0);
-	dup2(data->stdout, 1);
-	dup2(data->stdout, 2);
-	close(data->stdin);
-	close(data->stdout);
+	dup2(data->stdin_fd, 0);
+	dup2(data->stdout_fd, 1);
+	dup2(data->stdout_fd, 2);
+	close(data->stdin_fd);
+	close(data->stdout_fd);
 	close(data->close_me[0]);
 	close(data->close_me[1]);
 }
@@ -49,8 +49,8 @@ int start_watchdog(int *in_fd_ret, int *out_fd_ret, char *sock)
 		goto out_close_in;
 	}
 
-	data.stdin = out_fds[0];
-	data.stdout = in_fds[1];
+	data.stdin_fd = out_fds[0];
+	data.stdout_fd = in_fds[1];
 	data.close_me[0] = out_fds[1];
 	data.close_me[1] = in_fds[0];
 

arch/um/drivers/mconsole.h

@@ -7,7 +7,7 @@
 #ifndef __MCONSOLE_H__
 #define __MCONSOLE_H__
 
-#ifndef __KERNEL__
+#ifdef __UM_HOST__
 #include <stdint.h>
 #define u32 uint32_t
 #endif

arch/um/drivers/net_user.c

@@ -166,15 +166,15 @@ int net_sendto(int fd, void *buf, int len, void *to, int sock_len)
 
 struct change_pre_exec_data {
 	int close_me;
-	int stdout;
+	int stdout_fd;
 };
 
 static void change_pre_exec(void *arg)
 {
 	struct change_pre_exec_data *data = arg;
 
 	close(data->close_me);
-	dup2(data->stdout, 1);
+	dup2(data->stdout_fd, 1);
 }
 
 static int change_tramp(char **argv, char *output, int output_len)
@@ -189,7 +189,7 @@ static int change_tramp(char **argv, char *output, int output_len)
 		return err;
 	}
 	pe_data.close_me = fds[0];
-	pe_data.stdout = fds[1];
+	pe_data.stdout_fd = fds[1];
 	pid = run_helper(change_pre_exec, &pe_data, argv);
 
 	if (pid > 0)	/* Avoid hang as we won't get data in failure case. */

arch/um/drivers/slip_user.c

@@ -55,18 +55,18 @@ static int set_up_tty(int fd)
 }
 
 struct slip_pre_exec_data {
-	int stdin;
-	int stdout;
+	int stdin_fd;
+	int stdout_fd;
 	int close_me;
 };
 
 static void slip_pre_exec(void *arg)
 {
 	struct slip_pre_exec_data *data = arg;
 
-	if (data->stdin >= 0)
-		dup2(data->stdin, 0);
-	dup2(data->stdout, 1);
+	if (data->stdin_fd >= 0)
+		dup2(data->stdin_fd, 0);
+	dup2(data->stdout_fd, 1);
 	if (data->close_me >= 0)
 		close(data->close_me);
 }
@@ -85,8 +85,8 @@ static int slip_tramp(char **argv, int fd)
 	}
 
 	err = 0;
-	pe_data.stdin = fd;
-	pe_data.stdout = fds[1];
+	pe_data.stdin_fd = fd;
+	pe_data.stdout_fd = fds[1];
 	pe_data.close_me = fds[0];
 	err = run_helper(slip_pre_exec, &pe_data, argv);
 	if (err < 0)

arch/um/drivers/slirp_user.c

@@ -20,27 +20,27 @@ static int slirp_user_init(void *data, void *dev)
 }
 
 struct slirp_pre_exec_data {
-	int stdin;
-	int stdout;
+	int stdin_fd;
+	int stdout_fd;
 };
 
 static void slirp_pre_exec(void *arg)
 {
 	struct slirp_pre_exec_data *data = arg;
 
-	if (data->stdin != -1)
-		dup2(data->stdin, 0);
-	if (data->stdout != -1)
-		dup2(data->stdout, 1);
+	if (data->stdin_fd != -1)
+		dup2(data->stdin_fd, 0);
+	if (data->stdout_fd != -1)
+		dup2(data->stdout_fd, 1);
 }
 
 static int slirp_tramp(char **argv, int fd)
 {
 	struct slirp_pre_exec_data pe_data;
 	int pid;
 
-	pe_data.stdin = fd;
-	pe_data.stdout = fd;
+	pe_data.stdin_fd = fd;
+	pe_data.stdout_fd = fd;
 	pid = run_helper(slirp_pre_exec, &pe_data, argv);
 
 	return pid;

arch/um/include/asm/Kbuild

@@ -21,7 +21,6 @@ generic-y += param.h
 generic-y += pci.h
 generic-y += percpu.h
 generic-y += preempt.h
-generic-y += sections.h
 generic-y += switch_to.h
 generic-y += topology.h
 generic-y += trace_clock.h

arch/um/include/asm/ptrace-generic.h

@@ -8,7 +8,6 @@
 
 #ifndef __ASSEMBLY__
 
-#include <asm/ptrace-abi.h>
 #include <sysdep/ptrace.h>
 
 struct pt_regs {
@@ -37,7 +36,7 @@ extern int putreg(struct task_struct *child, int regno, unsigned long value);
 
 extern int arch_copy_tls(struct task_struct *new);
 extern void clear_flushed_tls(struct task_struct *task);
-extern void syscall_trace_enter(struct pt_regs *regs);
+extern int syscall_trace_enter(struct pt_regs *regs);
 extern void syscall_trace_leave(struct pt_regs *regs);
 
 #endif

arch/um/include/asm/sections.h

@@ -0,0 +1,9 @@
+#ifndef __UM_SECTIONS_H
+#define __UM_SECTIONS_H
+
+#include <asm-generic/sections.h>
+
+extern char __binary_start[];
+extern char __syscall_stub_start[], __syscall_stub_end[];
+
+#endif

arch/um/include/asm/thread_info.h

@@ -10,7 +10,7 @@
 
 #include <asm/types.h>
 #include <asm/page.h>
-#include <asm/uaccess.h>
+#include <asm/segment.h>
 
 struct thread_info {
 	struct task_struct	*task;		/* main task structure */