powerpc: Rename thread_struct.fs to addr_limit

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>

diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index eff269a..5debe33 100644 (file)
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -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 \

diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h
index a62ee66..a91cea1 100644 (file)
--- a/arch/powerpc/include/asm/uaccess.h
+++ b/arch/powerpc/include/asm/uaccess.h
@@ -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)