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s390: remove 31 bit support

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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: a960062e58 ("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>
This commit is contained in:
Heiko Carstens 2015-02-12 13:08:27 +01:00 • committed by Martin Schwidefsky
parent 1833c9f647
commit 5a79859ae0
97 changed files with 170 additions and 6016 deletions
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12
arch/s390/kernel/module.c
View file

@ -38,13 +38,8 @@
#define DEBUGP(fmt , ...)
#endif
#ifndef CONFIG_64BIT
#define PLT_ENTRY_SIZE 12
#else /* CONFIG_64BIT */
#define PLT_ENTRY_SIZE 20
#endif /* CONFIG_64BIT */
#ifdef CONFIG_64BIT
void *module_alloc(unsigned long size)
{
if (PAGE_ALIGN(size) > MODULES_LEN)
@ -53,7 +48,6 @@ void *module_alloc(unsigned long size)
GFP_KERNEL, PAGE_KERNEL, 0, NUMA_NO_NODE,
__builtin_return_address(0));
}
#endif
void module_arch_freeing_init(struct module *mod)
{
@ -323,17 +317,11 @@ static int apply_rela(Elf_Rela *rela, Elf_Addr base, Elf_Sym *symtab,
unsigned int *ip;
ip = me->module_core + me->arch.plt_offset +
info->plt_offset;
#ifndef CONFIG_64BIT
ip[0] = 0x0d105810; /* basr 1,0; l 1,6(1); br 1 */
ip[1] = 0x100607f1;
ip[2] = val;
#else /* CONFIG_64BIT */
ip[0] = 0x0d10e310; /* basr 1,0; lg 1,10(1); br 1 */
ip[1] = 0x100a0004;
ip[2] = 0x07f10000;
ip[3] = (unsigned int) (val >> 32);
ip[4] = (unsigned int) val;
#endif /* CONFIG_64BIT */
info->plt_initialized = 1;
}
if (r_type == R_390_PLTOFF16 ||