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powerpc: Rename thread_struct.fs to addr_limit

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It's called 'fs' for historical reasons, it's named after the x86 'FS'
register. But we don't have to use that name for the member of
thread_struct, and in fact arch/x86 doesn't even call it 'fs' anymore.

So rename it to 'addr_limit', which better reflects what it's used
for, and is also the name used on other arches.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Ellerman 2018-05-14 23:03:15 +10:00
parent 6bcdd2972b
commit ba0635fcbe
2 changed files with 5 additions and 5 deletions
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6
arch/powerpc/include/asm/processor.h
View File

@ -249,7 +249,7 @@ struct thread_struct {
unsigned long ksp_vsid;
#endif
struct pt_regs *regs; /* Pointer to saved register state */
mm_segment_t fs; /* for get_fs() validation */
mm_segment_t addr_limit; /* for get_fs() validation */
#ifdef CONFIG_BOOKE
/* BookE base exception scratch space; align on cacheline */
unsigned long normsave[8] ____cacheline_aligned;
@ -379,7 +379,7 @@ struct thread_struct {
#define INIT_THREAD { \
.ksp = INIT_SP, \
.ksp_limit = INIT_SP_LIMIT, \
.fs = KERNEL_DS, \
.addr_limit = KERNEL_DS, \
.pgdir = swapper_pg_dir, \
.fpexc_mode = MSR_FE0 | MSR_FE1, \
SPEFSCR_INIT \
@ -388,7 +388,7 @@ struct thread_struct {
#define INIT_THREAD { \
.ksp = INIT_SP, \
.regs = (struct pt_regs *)INIT_SP - 1, /* XXX bogus, I think */ \
.fs = KERNEL_DS, \
.addr_limit = KERNEL_DS, \
.fpexc_mode = 0, \
.ppr = INIT_PPR, \
.fscr = FSCR_TAR | FSCR_EBB \

4
arch/powerpc/include/asm/uaccess.h
View File

@ -30,8 +30,8 @@
#endif
#define get_ds() (KERNEL_DS)
#define get_fs() (current->thread.fs)
#define set_fs(val) (current->thread.fs = (val))
#define get_fs() (current->thread.addr_limit)
#define set_fs(val) (current->thread.addr_limit = (val))
#define segment_eq(a, b) ((a).seg == (b).seg)