leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

arm64/sve: Switch sve_pffr() argument from task to thread

Browse Source 
sve_pffr(), which is used to derive the base address used for
low-level SVE save/restore routines, currently takes the relevant
task_struct as an argument.

The only accessed fields are actually part of thread_struct, so
this patch changes the argument type accordingly.  This is done in
preparation for moving this function to a header, where we do not
want to have to include <linux/sched.h> due to the consequent
circular #include problems.

No functional change.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Dave Martin 2018-04-12 17:04:39 +01:00 committed by Marc Zyngier
parent 31dc52b3c8
commit 2cf97d46da
1 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/arm64/kernel/fpsimd.c
View File

@ -44,6 +44,7 @@
#include <asm/fpsimd.h>
#include <asm/cpufeature.h>
#include <asm/cputype.h>
#include <asm/processor.h>
#include <asm/simd.h>
#include <asm/sigcontext.h>
#include <asm/sysreg.h>
@ -167,10 +168,9 @@ static size_t sve_ffr_offset(int vl)
return SVE_SIG_FFR_OFFSET(sve_vq_from_vl(vl)) - SVE_SIG_REGS_OFFSET;
}
static void *sve_pffr(struct task_struct *task)
static void *sve_pffr(struct thread_struct *thread)
{
return (char *)task->thread.sve_state +
sve_ffr_offset(task->thread.sve_vl);
return (char *)thread->sve_state + sve_ffr_offset(thread->sve_vl);
}
static void change_cpacr(u64 val, u64 mask)
@ -253,7 +253,7 @@ static void task_fpsimd_load(void)
WARN_ON(!in_softirq() && !irqs_disabled());
if (system_supports_sve() && test_thread_flag(TIF_SVE))
sve_load_state(sve_pffr(current),
sve_load_state(sve_pffr(&current->thread),
&current->thread.uw.fpsimd_state.fpsr,
sve_vq_from_vl(current->thread.sve_vl) - 1);
else
@ -285,7 +285,7 @@ void fpsimd_save(void)
return;
}
sve_save_state(sve_pffr(current), &st->fpsr);
sve_save_state(sve_pffr(&current->thread), &st->fpsr);
} else
fpsimd_save_state(st);
}