diff options
| author | Lukas Bulwahn <lukas.bulwahn@gmail.com> | 2023-11-13 13:47:28 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-12-10 16:51:39 -0800 |
| commit | 69e583eaca579d50ffc699b1f4358258e75fa008 (patch) | |
| tree | 36a574ee7f3721da6460669cba9c66656ace8bfd /mm/mmap.c | |
| parent | 16f5dfbc851b55b87101a20e181d4a14be3007d6 (diff) | |
mmap: remove the IA64-specific vma expansion implementation
With commit cf8e8658100d ("arch: Remove Itanium (IA-64) architecture"),
there is no need to keep the IA64-specific vma expansion.
Clean up the IA64-specific vma expansion implementation.
Link: https://lkml.kernel.org/r/20231113124728.3974-1-lukas.bulwahn@gmail.com
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 37 |
1 files changed, 1 insertions, 36 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 4f1cb814586d..e8470b6b678c 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2207,42 +2207,7 @@ struct vm_area_struct *find_extend_vma_locked(struct mm_struct *mm, unsigned lon } #endif -/* - * IA64 has some horrid mapping rules: it can expand both up and down, - * but with various special rules. - * - * We'll get rid of this architecture eventually, so the ugliness is - * temporary. - */ -#ifdef CONFIG_IA64 -static inline bool vma_expand_ok(struct vm_area_struct *vma, unsigned long addr) -{ - return REGION_NUMBER(addr) == REGION_NUMBER(vma->vm_start) && - REGION_OFFSET(addr) < RGN_MAP_LIMIT; -} - -/* - * IA64 stacks grow down, but there's a special register backing store - * that can grow up. Only sequentially, though, so the new address must - * match vm_end. - */ -static inline int vma_expand_up(struct vm_area_struct *vma, unsigned long addr) -{ - if (!vma_expand_ok(vma, addr)) - return -EFAULT; - if (vma->vm_end != (addr & PAGE_MASK)) - return -EFAULT; - return expand_upwards(vma, addr); -} - -static inline bool vma_expand_down(struct vm_area_struct *vma, unsigned long addr) -{ - if (!vma_expand_ok(vma, addr)) - return -EFAULT; - return expand_downwards(vma, addr); -} - -#elif defined(CONFIG_STACK_GROWSUP) +#if defined(CONFIG_STACK_GROWSUP) #define vma_expand_up(vma,addr) expand_upwards(vma, addr) #define vma_expand_down(vma, addr) (-EFAULT) |