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| author | Heiko Carstens <hca@linux.ibm.com> | 2023-12-01 15:42:16 +0100 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2023-12-11 14:33:06 +0100 |
| commit | d7f679ec868e8675c269c742a2ba58c6aceaf52b (patch) | |
| tree | 66118c93c446fb7182b86842aaeb8aaeb4dd2cec /arch/s390/kernel | |
| parent | d7271ba40155d5e5c28e13516df5d9c69f40ef20 (diff) | |
| download | linux-d7f679ec868e8675c269c742a2ba58c6aceaf52b.tar.gz linux-d7f679ec868e8675c269c742a2ba58c6aceaf52b.tar.bz2 linux-d7f679ec868e8675c269c742a2ba58c6aceaf52b.zip | |
s390/fpu: remove ARCH_WANTS_DYNAMIC_TASK_STRUCT support
s390 selects ARCH_WANTS_DYNAMIC_TASK_STRUCT in order to make the size of
the task structure dependent on the availability of the vector
facility. This doesn't make sense anymore because since many years all
machines provide the vector facility.
Therefore simplify the code a bit and remove s390 support for
ARCH_WANTS_DYNAMIC_TASK_STRUCT.
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/process.c | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/setup.c | 17 |
2 files changed, 1 insertions, 18 deletions
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c index 258000417724..4e3b366589fb 100644 --- a/arch/s390/kernel/process.c +++ b/arch/s390/kernel/process.c @@ -89,7 +89,7 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) */ save_fpu_regs(); - memcpy(dst, src, arch_task_struct_size); + *dst = *src; dst->thread.fpu.regs = dst->thread.fpu.fprs; /* diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index c0e7cfdd7747..d1f3b56e7afc 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -820,22 +820,6 @@ static void __init setup_randomness(void) } /* - * Find the correct size for the task_struct. This depends on - * the size of the struct fpu at the end of the thread_struct - * which is embedded in the task_struct. - */ -static void __init setup_task_size(void) -{ - int task_size = sizeof(struct task_struct); - - if (!MACHINE_HAS_VX) { - task_size -= sizeof(__vector128) * __NUM_VXRS; - task_size += sizeof(freg_t) * __NUM_FPRS; - } - arch_task_struct_size = task_size; -} - -/* * Issue diagnose 318 to set the control program name and * version codes. */ @@ -927,7 +911,6 @@ void __init setup_arch(char **cmdline_p) os_info_init(); setup_ipl(); - setup_task_size(); setup_control_program_code(); /* Do some memory reservations *before* memory is added to memblock */ |