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authorDavid S. Miller <davem@davemloft.net>2009-02-09 01:00:55 -0500
committerDavid S. Miller <davem@davemloft.net>2009-02-09 01:00:55 -0500
commit40bdac7dbc161639a498697f34fbd1ee800e51f4 (patch)
tree5eef654722ba36d2921cafd8440d5e346f0fbdb5 /arch/sparc/kernel/head_64.S
parent1c2f61d40b691789626489fa947a3e003c9a84be (diff)
sparc64: Kill .fixup section bloat.
This is an implementation of a suggestion made by Chris Torek: -------------------- Something else I noticed in passing: the EX and EX_LD/EX_ST macros scattered throughout the various .S files make a fair bit of .fixup code, all of which does the same thing. At the cost of one symbol in copy_in_user.S, you could just have one common two-instruction retl-and-mov-1 fixup that they all share. -------------------- The following is with a defconfig build: text data bss dec hex filename 3972767 344024 584449 4901240 4ac978 vmlinux.orig 3968887 344024 584449 4897360 4aba50 vmlinux Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/head_64.S')
-rw-r--r--arch/sparc/kernel/head_64.S31
1 files changed, 28 insertions, 3 deletions
diff --git a/arch/sparc/kernel/head_64.S b/arch/sparc/kernel/head_64.S
index 8ffee714f932..a46c3a21e26d 100644
--- a/arch/sparc/kernel/head_64.S
+++ b/arch/sparc/kernel/head_64.S
@@ -891,10 +891,35 @@ prom_tba: .xword 0
891tlb_type: .word 0 /* Must NOT end up in BSS */ 891tlb_type: .word 0 /* Must NOT end up in BSS */
892 .section ".fixup",#alloc,#execinstr 892 .section ".fixup",#alloc,#execinstr
893 893
894 .globl __ret_efault, __retl_efault 894 .globl __ret_efault, __retl_efault, __ret_one, __retl_one
895__ret_efault: 895ENTRY(__ret_efault)
896 ret 896 ret
897 restore %g0, -EFAULT, %o0 897 restore %g0, -EFAULT, %o0
898__retl_efault: 898ENDPROC(__ret_efault)
899
900ENTRY(__retl_efault)
899 retl 901 retl
900 mov -EFAULT, %o0 902 mov -EFAULT, %o0
903ENDPROC(__retl_efault)
904
905ENTRY(__retl_one)
906 retl
907 mov 1, %o0
908ENDPROC(__retl_one)
909
910ENTRY(__ret_one_asi)
911 wr %g0, ASI_AIUS, %asi
912 ret
913 restore %g0, 1, %o0
914ENDPROC(__ret_one_asi)
915
916ENTRY(__retl_one_asi)
917 wr %g0, ASI_AIUS, %asi
918 retl
919 mov 1, %o0
920ENDPROC(__retl_one_asi)
921
922ENTRY(__retl_o1)
923 retl
924 mov %o1, %o0
925ENDPROC(__retl_o1)