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mm: Remove unused vm_brk() 

With fs/binfmt_elf.c fully refactored to use the new elf_load() helper,
there are no more users of vm_brk(), so remove it.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org
Suggested-by: Eric Biederman <ebiederm@xmission.com>
Tested-by: Pedro Falcato <pedro.falcato@gmail.com>
Signed-off-by: Sebastian Ott <sebott@redhat.com>
Link: https://lore.kernel.org/r/20230929032435.2391507-6-keescook@chromium.org
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Kees Cook 2023-09-28 20:24:34 -07:00
parent f9c0a39d95
commit 2632bb84d1
3 changed files with 1 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/linux/mm.h
View File

@ -3308,8 +3308,7 @@ static inline void mm_populate(unsigned long addr, unsigned long len)
static inline void mm_populate(unsigned long addr, unsigned long len) {}
#endif
/* These take the mm semaphore themselves */
extern int __must_check vm_brk(unsigned long, unsigned long);
/* This takes the mm semaphore itself */
extern int __must_check vm_brk_flags(unsigned long, unsigned long, unsigned long);
extern int vm_munmap(unsigned long, size_t);
extern unsigned long __must_check vm_mmap(struct file *, unsigned long,

6
mm/mmap.c
View File

@ -3174,12 +3174,6 @@ limits_failed:
}
EXPORT_SYMBOL(vm_brk_flags);
int vm_brk(unsigned long addr, unsigned long len)
{
return vm_brk_flags(addr, len, 0);
}
EXPORT_SYMBOL(vm_brk);
/* Release all mmaps. */
void exit_mmap(struct mm_struct *mm)
{

5
mm/nommu.c
View File

@ -1531,11 +1531,6 @@ void exit_mmap(struct mm_struct *mm)
mmap_write_unlock(mm);
}
int vm_brk(unsigned long addr, unsigned long len)
{
return -ENOMEM;
}
/*
* expand (or shrink) an existing mapping, potentially moving it at the same
* time (controlled by the MREMAP_MAYMOVE flag and available VM space)