x86/mpx: Move bd_addr to mm_context_t
Currently bd_addr lives in mm_struct, which is otherwise architecture
independent. Architecture-specific data is supposed to live within
mm_context_t (itself contained in mm_struct).
Other x86-specific context like the pkey accounting data lives in
mm_context_t, and there's no readon the MPX data can't also live there.
So as to keep the arch-specific data togather, and to set a good example
for others, this patch moves bd_addr into x86's mm_context_t.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/1481892055-24596-1-git-send-email-mark.rutland@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/mm/mpx.c b/arch/x86/mm/mpx.c
index e4f8009..324e571 100644
--- a/arch/x86/mm/mpx.c
+++ b/arch/x86/mm/mpx.c
@@ -350,12 +350,12 @@ int mpx_enable_management(void)
* The copy_xregs_to_kernel() beneath get_xsave_field_ptr() is
* expected to be relatively expensive. Storing the bounds
* directory here means that we do not have to do xsave in the
- * unmap path; we can just use mm->bd_addr instead.
+ * unmap path; we can just use mm->context.bd_addr instead.
*/
bd_base = mpx_get_bounds_dir();
down_write(&mm->mmap_sem);
- mm->bd_addr = bd_base;
- if (mm->bd_addr == MPX_INVALID_BOUNDS_DIR)
+ mm->context.bd_addr = bd_base;
+ if (mm->context.bd_addr == MPX_INVALID_BOUNDS_DIR)
ret = -ENXIO;
up_write(&mm->mmap_sem);
@@ -370,7 +370,7 @@ int mpx_disable_management(void)
return -ENXIO;
down_write(&mm->mmap_sem);
- mm->bd_addr = MPX_INVALID_BOUNDS_DIR;
+ mm->context.bd_addr = MPX_INVALID_BOUNDS_DIR;
up_write(&mm->mmap_sem);
return 0;
}
@@ -947,7 +947,7 @@ static int try_unmap_single_bt(struct mm_struct *mm,
end = bta_end_vaddr;
}
- bde_vaddr = mm->bd_addr + mpx_get_bd_entry_offset(mm, start);
+ bde_vaddr = mm->context.bd_addr + mpx_get_bd_entry_offset(mm, start);
ret = get_bt_addr(mm, bde_vaddr, &bt_addr);
/*
* No bounds table there, so nothing to unmap.