diff options
| author |   Paul Burton <paul.burton@mips.com> | 2018-11-07 23:14:10 +0000 |
|---|---|---|
| committer | Paul Burton <paul.burton@mips.com> | 2018-11-09 10:23:19 -0800 |
| commit | 2725f3778fddb70526318824de63476aff816ab8 (patch) | |
| tree | 55a466f045c9b3a3ffd1ccc1d4597e7848e980a2 | |
| parent | MIPS: Don't compile math-emu when CONFIG_MIPS_FP_SUPPORT=n (diff) | |
| download | linux-dev-2725f3778fddb70526318824de63476aff816ab8.tar.xz linux-dev-2725f3778fddb70526318824de63476aff816ab8.zip | |
MIPS: Remove struct task_struct fpu state when CONFIG_MIPS_FP_SUPPORT=n
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
| -rw-r--r-- | arch/mips/include/asm/processor.h | 19 | ||||
| -rw-r--r-- | arch/mips/kernel/asm-offsets.c | 7 |
2 files changed, 20 insertions, 6 deletions
diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h index ce3ed4d17813..aca909bd7841 100644 --- a/arch/mips/include/asm/processor.h +++ b/arch/mips/include/asm/processor.h @@ -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) \ */ \ diff --git a/arch/mips/kernel/asm-offsets.c b/arch/mips/kernel/asm-offsets.c index cbe4742d2fff..aebfda81120a 100644 --- a/arch/mips/kernel/asm-offsets.c +++ b/arch/mips/kernel/asm-offsets.c @@ -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) |