Commit 9e0243db authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml 

Pull UML updates from Richard Weinberger:
 "Beside of various fixes this also contains patches to enable features
  such was Kcov, kmemleak and TRACE_IRQFLAGS_SUPPORT on UML"

* 'for-linus-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
  hostfs: Freeing an ERR_PTR in hostfs_fill_sb_common()
  um: Support kcov
  um: Enable TRACE_IRQFLAGS_SUPPORT
  um: Use asm-generic/irqflags.h
  um: Fix possible deadlock in sig_handler_common()
  um: Select HAVE_DEBUG_KMEMLEAK
  um: Setup physical memory in setup_arch()
  um: Eliminate null test after alloc_bootmem
parents b067c904 8a545f18

arch/um/Kconfig.common

+3 −2
Original line number Diff line number Diff line 
config UML

	bool

	default y

	select ARCH_HAS_KCOV

	select HAVE_ARCH_AUDITSYSCALL

	select HAVE_ARCH_SECCOMP_FILTER

	select HAVE_UID16

	select HAVE_FUTEX_CMPXCHG if FUTEX

	select HAVE_DEBUG_KMEMLEAK

	select GENERIC_IRQ_SHOW

	select GENERIC_CPU_DEVICES

	select GENERIC_IO
@@ -31,10 +33,9 @@ config PCI 
config PCMCIA

	bool



# Yet to do!

config TRACE_IRQFLAGS_SUPPORT

	bool

	default n

	default y



config LOCKDEP_SUPPORT

	bool

arch/um/include/asm/irqflags.h

+7 −11
Original line number Diff line number Diff line
@@ -6,37 +6,33 @@ extern int set_signals(int enable); 
extern void block_signals(void);

extern void unblock_signals(void);



#define arch_local_save_flags arch_local_save_flags

static inline unsigned long arch_local_save_flags(void)

{

	return get_signals();

}



#define arch_local_irq_restore arch_local_irq_restore

static inline void arch_local_irq_restore(unsigned long flags)

{

	set_signals(flags);

}



#define arch_local_irq_enable arch_local_irq_enable

static inline void arch_local_irq_enable(void)

{

	unblock_signals();

}



#define arch_local_irq_disable arch_local_irq_disable

static inline void arch_local_irq_disable(void)

{

	block_signals();

}



static inline unsigned long arch_local_irq_save(void)

{

	unsigned long flags;

	flags = arch_local_save_flags();

	arch_local_irq_disable();

	return flags;

}

#define ARCH_IRQ_DISABLED	0

#define ARCh_IRQ_ENABLED	(SIGIO|SIGVTALRM)



static inline bool arch_irqs_disabled(void)

{

	return arch_local_save_flags() == 0;

}

#include <asm-generic/irqflags.h>



#endif

arch/um/kernel/Makefile

+5 −0
Original line number Diff line number Diff line
@@ -3,6 +3,11 @@ 
# Licensed under the GPL

#



# Don't instrument UML-specific code; without this, we may crash when

# accessing the instrumentation buffer for the first time from the

# kernel.

KCOV_INSTRUMENT                := n



CPPFLAGS_vmlinux.lds := -DSTART=$(LDS_START)		\

                        -DELF_ARCH=$(LDS_ELF_ARCH)	\

                        -DELF_FORMAT=$(LDS_ELF_FORMAT)	\

arch/um/kernel/initrd.c

+0 −2
Original line number Diff line number Diff line
@@ -37,8 +37,6 @@ static int __init read_initrd(void) 
	}



	area = alloc_bootmem(size);

	if (area == NULL)

		return 0;



	if (load_initrd(initrd, area, size) == -1)

		return 0;

arch/um/kernel/um_arch.c

+4 −4
Original line number Diff line number Diff line
@@ -319,9 +319,6 @@ int __init linux_main(int argc, char **argv) 


	start_vm = VMALLOC_START;



	setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem);

	mem_total_pages(physmem_size, iomem_size, highmem);



	virtmem_size = physmem_size;

	stack = (unsigned long) argv;

	stack &= ~(1024 * 1024 - 1);
@@ -334,7 +331,6 @@ int __init linux_main(int argc, char **argv) 
		printf("Kernel virtual memory size shrunk to %lu bytes\n",

		       virtmem_size);



	stack_protections((unsigned long) &init_thread_info);

	os_flush_stdout();



	return start_uml();
@@ -342,6 +338,10 @@ int __init linux_main(int argc, char **argv) 


void __init setup_arch(char **cmdline_p)

{

	stack_protections((unsigned long) &init_thread_info);

	setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem);

	mem_total_pages(physmem_size, iomem_size, highmem);



	paging_init();

	strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);

	*cmdline_p = command_line;

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