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exec: kill the unnecessary mm->def_flags setting in load_elf_binary()
load_elf_binary() sets current->mm->def_flags = def_flags and def_flags is always zero. Not only this looks strange, this is unnecessary because mm_init() has already set ->def_flags = 0. Signed-off-by: Alex Thorlton <athorlton@sgi.com> Suggested-by: Oleg Nesterov <oleg@redhat.com> Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Mel Gorman <mgorman@suse.de> Acked-by: Rik van Riel <riel@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: David Rientjes <rientjes@google.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -584,7 +584,6 @@ static int load_elf_binary(struct linux_binprm *bprm)
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unsigned long start_code, end_code, start_data, end_data;
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unsigned long reloc_func_desc __maybe_unused = 0;
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int executable_stack = EXSTACK_DEFAULT;
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unsigned long def_flags = 0;
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struct pt_regs *regs = current_pt_regs();
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struct {
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struct elfhdr elf_ex;
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@ -724,9 +723,6 @@ static int load_elf_binary(struct linux_binprm *bprm)
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if (retval)
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goto out_free_dentry;
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/* OK, This is the point of no return */
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current->mm->def_flags = def_flags;
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/* Do this immediately, since STACK_TOP as used in setup_arg_pages
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may depend on the personality. */
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SET_PERSONALITY(loc->elf_ex);
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