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Commit c10e83f5 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Ingo Molnar
Browse files

arch, mm: Allow arch_dup_mmap() to fail 



In order to sanitize the LDT initialization on x86 arch_dup_mmap() must be
allowed to fail. Fix up all instances.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirsky <luto@kernel.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Laight <David.Laight@aculab.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Eduardo Valentin <eduval@amazon.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: aliguori@amazon.com
Cc: dan.j.williams@intel.com
Cc: hughd@google.com
Cc: keescook@google.com
Cc: kirill.shutemov@linux.intel.com
Cc: linux-mm@kvack.org
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 4831b779

arch/powerpc/include/asm/mmu_context.h

+3 −2
Original line number Diff line number Diff line
@@ -114,9 +114,10 @@ static inline void enter_lazy_tlb(struct mm_struct *mm, 
#endif

}



static inline void arch_dup_mmap(struct mm_struct *oldmm,

static inline int arch_dup_mmap(struct mm_struct *oldmm,

				struct mm_struct *mm)

{

	return 0;

}



static inline void arch_exit_mmap(struct mm_struct *mm)

arch/um/include/asm/mmu_context.h

+2 −1
Original line number Diff line number Diff line
@@ -15,9 +15,10 @@ extern void uml_setup_stubs(struct mm_struct *mm); 
/*

 * Needed since we do not use the asm-generic/mm_hooks.h:

 */

static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)

static inline int arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)

{

	uml_setup_stubs(mm);

	return 0;

}

extern void arch_exit_mmap(struct mm_struct *mm);

static inline void arch_unmap(struct mm_struct *mm,

arch/unicore32/include/asm/mmu_context.h

+3 −2
Original line number Diff line number Diff line
@@ -81,9 +81,10 @@ do { \ 
	} \

} while (0)



static inline void arch_dup_mmap(struct mm_struct *oldmm,

static inline int arch_dup_mmap(struct mm_struct *oldmm,

				struct mm_struct *mm)

{

	return 0;

}



static inline void arch_unmap(struct mm_struct *mm,

arch/x86/include/asm/mmu_context.h

+2 −2
Original line number Diff line number Diff line
@@ -176,10 +176,10 @@ do { \ 
} while (0)

#endif



static inline void arch_dup_mmap(struct mm_struct *oldmm,

				 struct mm_struct *mm)

static inline int arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)

{

	paravirt_arch_dup_mmap(oldmm, mm);

	return 0;

}



static inline void arch_exit_mmap(struct mm_struct *mm)

include/asm-generic/mm_hooks.h

+3 −2
Original line number Diff line number Diff line
@@ -7,9 +7,10 @@ 
#ifndef _ASM_GENERIC_MM_HOOKS_H

#define _ASM_GENERIC_MM_HOOKS_H



static inline void arch_dup_mmap(struct mm_struct *oldmm,

static inline int arch_dup_mmap(struct mm_struct *oldmm,

				struct mm_struct *mm)

{

	return 0;

}



static inline void arch_exit_mmap(struct mm_struct *mm)