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MIPS: Remove struct task_struct fpu state when CONFIG_MIPS_FP_SUPPORT=n

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When CONFIG_MIPS_FP_SUPPORT=n we don't support floating point & so don't
need to preserve floating point context for tasks. Remove that context
from struct task_struct.

Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/21013/
Cc: linux-mips@linux-mips.org
This commit is contained in:
Paul Burton 2018-11-07 23:14:10 +00:00
parent 42b10815d5
commit 2725f3778f
No known key found for this signature in database
GPG Key ID: 3EA79FACB57500DD
2 changed files with 20 additions and 6 deletions
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19
arch/mips/include/asm/processor.h
View File

@ -255,8 +255,10 @@ struct thread_struct {
/* Saved cp0 stuff. */
unsigned long cp0_status;
#ifdef CONFIG_MIPS_FP_SUPPORT
/* Saved fpu/fpu emulator stuff. */
struct mips_fpu_struct fpu FPU_ALIGN;
#endif
/* Assigned branch delay slot 'emulation' frame */
atomic_t bd_emu_frame;
/* PC of the branch from a branch delay slot 'emulation' */
@ -299,6 +301,17 @@ struct thread_struct {
#define FPAFF_INIT
#endif /* CONFIG_MIPS_MT_FPAFF */
#ifdef CONFIG_MIPS_FP_SUPPORT
# define FPU_INIT \
.fpu = { \
.fpr = {{{0,},},}, \
.fcr31 = 0, \
.msacsr = 0, \
},
#else
# define FPU_INIT
#endif
#define INIT_THREAD { \
/* \
* Saved main processor registers \
@ -321,11 +334,7 @@ struct thread_struct {
/* \
* Saved FPU/FPU emulator stuff \
*/ \
.fpu = { \
.fpr = {{{0,},},}, \
.fcr31 = 0, \
.msacsr = 0, \
}, \
FPU_INIT \
/* \
* FPU affinity state (null if not FPAFF) \
*/ \

7
arch/mips/kernel/asm-offsets.c
View File

@ -123,7 +123,6 @@ void output_thread_defines(void)
OFFSET(THREAD_REG31, task_struct, thread.reg31);
OFFSET(THREAD_STATUS, task_struct,
thread.cp0_status);
OFFSET(THREAD_FPU, task_struct, thread.fpu);
OFFSET(THREAD_BVADDR, task_struct, \
thread.cp0_badvaddr);
@ -135,8 +134,11 @@ void output_thread_defines(void)
BLANK();
}
#ifdef CONFIG_MIPS_FP_SUPPORT
void output_thread_fpu_defines(void)
{
OFFSET(THREAD_FPU, task_struct, thread.fpu);
OFFSET(THREAD_FPR0, task_struct, thread.fpu.fpr[0]);
OFFSET(THREAD_FPR1, task_struct, thread.fpu.fpr[1]);
OFFSET(THREAD_FPR2, task_struct, thread.fpu.fpr[2]);
@ -174,6 +176,7 @@ void output_thread_fpu_defines(void)
OFFSET(THREAD_MSA_CSR, task_struct, thread.fpu.msacsr);
BLANK();
}
#endif
void output_mm_defines(void)
{
@ -341,6 +344,7 @@ void output_pm_defines(void)
}
#endif
#ifdef CONFIG_MIPS_FP_SUPPORT
void output_kvm_defines(void)
{
COMMENT(" KVM/MIPS Specific offsets. ");
@ -382,6 +386,7 @@ void output_kvm_defines(void)
OFFSET(VCPU_MSA_CSR, kvm_vcpu_arch, fpu.msacsr);
BLANK();
}
#endif
#ifdef CONFIG_MIPS_CPS
void output_cps_defines(void)