diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2023-03-21 12:01:02 +0100 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2023-04-11 11:07:08 +0100 |
| commit | dae904d96ad6a5fa79bd9d99a3decf93685d398b (patch) | |
| tree | ad23ef12e2f542d51e76bb4cf489f40b69f90d91 /arch/arm/vfp/entry.S | |
| parent | 197b6b60ae7bc51dd0814953c562833143b292aa (diff) | |
ARM: 9292/1: vfp: Pass thread_info pointer to vfp_support_entry
Instead of dereferencing thread_info in do_vfp, pass the thread_info
pointer to vfp_support_entry via R1. That way, we only use a single
caller save register, which makes it easier to convert do_vfp to C code
in a subsequent patch.
Note that, unlike the CPU number, which can change due to preemption,
passing the thread_info pointer can safely be done with preemption
enabled.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm/vfp/entry.S')
| -rw-r--r-- | arch/arm/vfp/entry.S | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/arm/vfp/entry.S b/arch/arm/vfp/entry.S index 9a89264cdcc0..cfedc2a3dbd6 100644 --- a/arch/arm/vfp/entry.S +++ b/arch/arm/vfp/entry.S @@ -22,15 +22,12 @@ @ IRQs enabled. @ ENTRY(do_vfp) - local_bh_disable r10, r4 + mov r1, r10 ldr r4, .LCvfp - ldr r11, [r10, #TI_CPU] @ CPU number - add r10, r10, #TI_VFPSTATE @ r10 = workspace ldr pc, [r4] @ call VFP entry point ENDPROC(do_vfp) ENTRY(vfp_null_entry) - local_bh_enable_ti r10, r4 ret lr ENDPROC(vfp_null_entry) |