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s390/fpu: change type of fpu mask from u32 to int

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Change type of fpu mask consistently from u32 to int. This is a
prerequisite to make the kernel fpu usage preemptible. Upcoming code
uses __atomic* ops which work with int pointers.

Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2024-02-03 11:45:11 +01:00
parent 87c5c70036
commit c038b984a9
3 changed files with 9 additions and 9 deletions
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2
arch/s390/include/asm/fpu-types.h
View File

@ -24,7 +24,7 @@ struct fpu {
/* In-kernel FPU state structure */
struct kernel_fpu {
u32 mask;
int mask;
u32 fpc;
union {
freg_t fprs[__NUM_FPRS];

8
arch/s390/include/asm/fpu.h
View File

@ -89,8 +89,8 @@ enum {
*
* Prefer using the kernel_fpu_begin()/kernel_fpu_end() pair of functions.
*/
void __kernel_fpu_begin(struct kernel_fpu *state, u32 flags);
void __kernel_fpu_end(struct kernel_fpu *state, u32 flags);
void __kernel_fpu_begin(struct kernel_fpu *state, int flags);
void __kernel_fpu_end(struct kernel_fpu *state, int flags);
static __always_inline void save_vx_regs(__vector128 *vxrs)
{
@ -144,7 +144,7 @@ static __always_inline void load_fp_regs(freg_t *fprs)
fpu_ld(15, &fprs[15]);
}
static inline void kernel_fpu_begin(struct kernel_fpu *state, u32 flags)
static inline void kernel_fpu_begin(struct kernel_fpu *state, int flags)
{
preempt_disable();
state->mask = S390_lowcore.fpu_flags;
@ -158,7 +158,7 @@ static inline void kernel_fpu_begin(struct kernel_fpu *state, u32 flags)
S390_lowcore.fpu_flags |= flags;
}
static inline void kernel_fpu_end(struct kernel_fpu *state, u32 flags)
static inline void kernel_fpu_end(struct kernel_fpu *state, int flags)
{
S390_lowcore.fpu_flags = state->mask;
if (state->mask & flags) {

8
arch/s390/kernel/fpu.c
View File

@ -10,10 +10,10 @@
#include <linux/sched.h>
#include <asm/fpu.h>
void __kernel_fpu_begin(struct kernel_fpu *state, u32 flags)
void __kernel_fpu_begin(struct kernel_fpu *state, int flags)
{
__vector128 *vxrs = state->vxrs;
u32 mask;
int mask;
/*
* Limit the save to the FPU/vector registers already
@ -58,10 +58,10 @@ void __kernel_fpu_begin(struct kernel_fpu *state, u32 flags)
}
EXPORT_SYMBOL(__kernel_fpu_begin);
void __kernel_fpu_end(struct kernel_fpu *state, u32 flags)
void __kernel_fpu_end(struct kernel_fpu *state, int flags)
{
__vector128 *vxrs = state->vxrs;
u32 mask;
int mask;
/*
* Limit the restore to the FPU/vector registers of the