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| author | Benjamin Berg <benjamin.berg@intel.com> | 2024-10-05 01:38:21 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2024-10-10 12:10:30 +0200 |
| commit | c6ce72005d1af98b983cc27aaa770afa66a1ca90 (patch) | |
| tree | 6136475501f012c44695a75bdd6dd5c1b50f1599 /arch/um/include | |
| parent | 48a858e0819ab9aad37d30cd2efadff928504021 (diff) | |
| download | linux-c6ce72005d1af98b983cc27aaa770afa66a1ca90.tar.gz linux-c6ce72005d1af98b983cc27aaa770afa66a1ca90.tar.bz2 linux-c6ce72005d1af98b983cc27aaa770afa66a1ca90.zip | |
um: remove auxiliary FP registers
We do not need the extra save/restore of the FP registers when getting
the fault information. This was originally added in commit 2f56debd77a8
("uml: fix FP register corruption") but at that time the code was not
saving/restoring the FP registers when switching to userspace. This was
fixed in commit fbfe9c847edf ("um: Save FPU registers between task
switches") and since then the auxiliary registers have not been useful.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Link: https://patch.msgid.link/20241004233821.2130874-1-benjamin@sipsolutions.net
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'arch/um/include')
| -rw-r--r-- | arch/um/include/asm/thread_info.h | 2 | ||||
| -rw-r--r-- | arch/um/include/shared/os.h | 2 |
2 files changed, 1 insertions, 3 deletions
diff --git a/arch/um/include/asm/thread_info.h b/arch/um/include/asm/thread_info.h index c7b4b49826a2..4d2a768246bc 100644 --- a/arch/um/include/asm/thread_info.h +++ b/arch/um/include/asm/thread_info.h @@ -23,8 +23,6 @@ struct thread_info { int preempt_count; /* 0 => preemptable, <0 => BUG */ struct thread_info *real_thread; /* Points to non-IRQ stack */ - unsigned long aux_fp_regs[FP_SIZE]; /* auxiliary fp_regs to save/restore - them out-of-band */ }; #define INIT_THREAD_INFO(tsk) \ diff --git a/arch/um/include/shared/os.h b/arch/um/include/shared/os.h index e54f64f55bb7..b511637e1f76 100644 --- a/arch/um/include/shared/os.h +++ b/arch/um/include/shared/os.h @@ -285,7 +285,7 @@ int protect(struct mm_id *mm_idp, unsigned long addr, /* skas/process.c */ extern int is_skas_winch(int pid, int fd, void *data); extern int start_userspace(unsigned long stub_stack); -extern void userspace(struct uml_pt_regs *regs, unsigned long *aux_fp_regs); +extern void userspace(struct uml_pt_regs *regs); extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void)); extern void switch_threads(jmp_buf *me, jmp_buf *you); extern int start_idle_thread(void *stack, jmp_buf *switch_buf); |