x86: Use __pa_symbol instead of __pa on C visible symbols

When I made an attempt at separating __pa_symbol and __pa I found that there
were a number of cases where __pa was used on an obvious symbol.

I also caught one non-obvious case as _brk_start and _brk_end are based on the
address of __brk_base which is a C visible symbol.

In mark_rodata_ro I was able to reduce the overhead of kernel symbol to
virtual memory translation by using a combination of __va(__pa_symbol())
instead of page_address(virt_to_page()).

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Link: http://lkml.kernel.org/r/20121116215640.8521.80483.stgit@ahduyck-cp1.jf.intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/arch/x86/realmode/init.c b/arch/x86/realmode/init.c
index cbca565af5bd..80450261215c 100644
--- a/arch/x86/realmode/init.c
+++ b/arch/x86/realmode/init.c
@@ -62,9 +62,9 @@ void __init setup_real_mode(void)
                 __va(real_mode_header->trampoline_header);
 
 #ifdef CONFIG_X86_32
-        trampoline_header->start = __pa(startup_32_smp);
+        trampoline_header->start = __pa_symbol(startup_32_smp);
         trampoline_header->gdt_limit = __BOOT_DS + 7;
-        trampoline_header->gdt_base = __pa(boot_gdt);
+        trampoline_header->gdt_base = __pa_symbol(boot_gdt);
 #else
         /*
          * Some AMD processors will #GP(0) if EFER.LMA is set in WRMSR
@@ -78,8 +78,8 @@ void __init setup_real_mode(void)
         *trampoline_cr4_features = read_cr4();
 
         trampoline_pgd = (u64 *) __va(real_mode_header->trampoline_pgd);
-        trampoline_pgd[0] = __pa(level3_ident_pgt) + _KERNPG_TABLE;
-        trampoline_pgd[511] = __pa(level3_kernel_pgt) + _KERNPG_TABLE;
+        trampoline_pgd[0] = __pa_symbol(level3_ident_pgt) + _KERNPG_TABLE;
+        trampoline_pgd[511] = __pa_symbol(level3_kernel_pgt) + _KERNPG_TABLE;
 #endif
 }