diff options
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2015-02-12 15:08:27 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-03-25 13:49:33 +0300 |
| commit | 5a79859ae0f35d25c67a03e82bf0c80592f16a39 (patch) | |
| tree | 37264d49f069812f19ced94e6ae171814fb7e498 /arch/s390/mm/vmem.c | |
| parent | 1833c9f647e9bda1cd24653ff8f9c207b5f5b911 (diff) | |
| download | linux-5a79859ae0f35d25c67a03e82bf0c80592f16a39.tar.xz | |
s390: remove 31 bit support
Remove the 31 bit support in order to reduce maintenance cost and
effectively remove dead code. Since a couple of years there is no
distribution left that comes with a 31 bit kernel.
The 31 bit kernel also has been broken since more than a year before
anybody noticed. In addition I added a removal warning to the kernel
shown at ipl for 5 minutes: a960062e5826 ("s390: add 31 bit warning
message") which let everybody know about the plan to remove 31 bit
code. We didn't get any response.
Given that the last 31 bit only machine was introduced in 1999 let's
remove the code.
Anybody with 31 bit user space code can still use the compat mode.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm/vmem.c')
| -rw-r--r-- | arch/s390/mm/vmem.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index b1593c2f751a..ef7d6c8fea66 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -38,12 +38,10 @@ static inline pud_t *vmem_pud_alloc(void) { pud_t *pud = NULL; -#ifdef CONFIG_64BIT pud = vmem_alloc_pages(2); if (!pud) return NULL; clear_table((unsigned long *) pud, _REGION3_ENTRY_EMPTY, PAGE_SIZE * 4); -#endif return pud; } @@ -51,12 +49,10 @@ static inline pmd_t *vmem_pmd_alloc(void) { pmd_t *pmd = NULL; -#ifdef CONFIG_64BIT pmd = vmem_alloc_pages(2); if (!pmd) return NULL; clear_table((unsigned long *) pmd, _SEGMENT_ENTRY_EMPTY, PAGE_SIZE * 4); -#endif return pmd; } @@ -98,7 +94,7 @@ static int vmem_add_mem(unsigned long start, unsigned long size, int ro) pgd_populate(&init_mm, pg_dir, pu_dir); } pu_dir = pud_offset(pg_dir, address); -#if defined(CONFIG_64BIT) && !defined(CONFIG_DEBUG_PAGEALLOC) +#ifndef CONFIG_DEBUG_PAGEALLOC if (MACHINE_HAS_EDAT2 && pud_none(*pu_dir) && address && !(address & ~PUD_MASK) && (address + PUD_SIZE <= end)) { pud_val(*pu_dir) = __pa(address) | @@ -115,7 +111,7 @@ static int vmem_add_mem(unsigned long start, unsigned long size, int ro) pud_populate(&init_mm, pu_dir, pm_dir); } pm_dir = pmd_offset(pu_dir, address); -#if defined(CONFIG_64BIT) && !defined(CONFIG_DEBUG_PAGEALLOC) +#ifndef CONFIG_DEBUG_PAGEALLOC if (MACHINE_HAS_EDAT1 && pmd_none(*pm_dir) && address && !(address & ~PMD_MASK) && (address + PMD_SIZE <= end)) { pmd_val(*pm_dir) = __pa(address) | @@ -222,7 +218,6 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node) pm_dir = pmd_offset(pu_dir, address); if (pmd_none(*pm_dir)) { -#ifdef CONFIG_64BIT /* Use 1MB frames for vmemmap if available. We always * use large frames even if they are only partially * used. @@ -240,7 +235,6 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node) address = (address + PMD_SIZE) & PMD_MASK; continue; } -#endif pt_dir = vmem_pte_alloc(address); if (!pt_dir) goto out; |