--- /dev/null
+MIPS: allow disabling the kernel FPU emulator
+
+This patch allows turning off the in-kernel Algorithmics
+FPU emulator support, which allows one to save a couple of
+precious blocks on an embedded system.
+
+Signed-off-by: Florian Fainelli <florian@openwrt.org>
+
+--- a/arch/mips/Kconfig
++++ b/arch/mips/Kconfig
+@@ -938,6 +938,17 @@ config LIMITED_DMA
+ config MIPS_BONITO64
+ bool
+
++config MIPS_FPU_EMU
++ bool
++ default n
++ help
++ This option allows building a kernel with or without the Algorithmics
++ FPU emulator enabled. Turning off this option results in a kernel which
++ does not catch floating operations exceptions. Make sure that your toolchain
++ is configured to enable software floating point emulation in that case.
++
++ If unsure say Y here.
++
+ config MIPS_MSC
+ bool
+
+--- a/arch/mips/math-emu/Makefile
++++ b/arch/mips/math-emu/Makefile
+@@ -1,11 +1,12 @@
+ #
+ # Makefile for the Linux/MIPS kernel FPU emulation.
+ #
++obj-y := kernel_linkage.o dsemul.o cp1emu.o
+
+-obj-y := cp1emu.o ieee754m.o ieee754d.o ieee754dp.o ieee754sp.o ieee754.o \
++obj-$(CONFIG_MIPS_FPU_EMU) += ieee754m.o ieee754d.o ieee754dp.o ieee754sp.o ieee754.o \
+ ieee754xcpt.o dp_frexp.o dp_modf.o dp_div.o dp_mul.o dp_sub.o \
+ dp_add.o dp_fsp.o dp_cmp.o dp_logb.o dp_scalb.o dp_simple.o \
+ dp_tint.o dp_fint.o dp_tlong.o dp_flong.o sp_frexp.o sp_modf.o \
+ sp_div.o sp_mul.o sp_sub.o sp_add.o sp_fdp.o sp_cmp.o sp_logb.o \
+ sp_scalb.o sp_simple.o sp_tint.o sp_fint.o sp_tlong.o sp_flong.o \
+- dp_sqrt.o sp_sqrt.o kernel_linkage.o dsemul.o
++ dp_sqrt.o sp_sqrt.o
+--- a/arch/mips/math-emu/cp1emu.c
++++ b/arch/mips/math-emu/cp1emu.c
+@@ -56,6 +56,12 @@
+ #endif
+ #define __mips 4
+
++/* Further private data for which no space exists in mips_fpu_struct */
++
++struct mips_fpu_emulator_stats fpuemustats;
++
++#ifdef CONFIG_MIPS_FPU_EMU
++
+ /* Function which emulates a floating point instruction. */
+
+ static int fpu_emu(struct pt_regs *, struct mips_fpu_struct *,
+@@ -66,10 +72,6 @@ static int fpux_emu(struct pt_regs *,
+ struct mips_fpu_struct *, mips_instruction);
+ #endif
+
+-/* Further private data for which no space exists in mips_fpu_struct */
+-
+-struct mips_fpu_emulator_stats fpuemustats;
+-
+ /* Control registers */
+
+ #define FPCREG_RID 0 /* $0 = revision id */
+@@ -1277,3 +1279,10 @@ int fpu_emulator_cop1Handler(struct pt_r
+
+ return sig;
+ }
++#else
++int fpu_emulator_cop1Handler(struct pt_regs *xcp, struct mips_fpu_struct *ctx,
++ int has_fpu)
++{
++ return 0;
++}
++#endif /* CONFIG_MIPS_FPU_EMU */
+--- a/arch/mips/math-emu/dsemul.c
++++ b/arch/mips/math-emu/dsemul.c
+@@ -112,6 +112,7 @@ int mips_dsemul(struct pt_regs *regs, mi
+ return SIGILL; /* force out of emulation loop */
+ }
+
++#ifdef CONFIG_MIPS_FPU_EMU
+ int do_dsemulret(struct pt_regs *xcp)
+ {
+ struct emuframe *fr;
+@@ -167,3 +168,9 @@ int do_dsemulret(struct pt_regs *xcp)
+
+ return 1;
+ }
++#else
++int do_dsemulret(struct pt_regs *xcp)
++{
++ return 0;
++}
++#endif /* CONFIG_MIPS_FPU_EMU */
+--- a/arch/mips/math-emu/kernel_linkage.c
++++ b/arch/mips/math-emu/kernel_linkage.c
+@@ -28,6 +28,7 @@
+
+ #define SIGNALLING_NAN 0x7ff800007ff80000LL
+
++#ifdef CONFIG_MIPS_FPU_EMU
+ void fpu_emulator_init_fpu(void)
+ {
+ static int first = 1;
+@@ -111,4 +112,36 @@ int fpu_emulator_restore_context32(struc
+
+ return err;
+ }
+-#endif
++#endif /* CONFIG_64BIT */
++#else
++
++void fpu_emulator_init_fpu(void)
++{
++ printk(KERN_INFO "FPU emulator disabled, make sure your toolchain"
++ "was compiled with software floating point support (soft-float)\n");
++ return;
++}
++
++int fpu_emulator_save_context(struct sigcontext __user *sc)
++{
++ return 0;
++}
++
++int fpu_emulator_restore_context(struct sigcontext __user *sc)
++{
++ return 0;
++}
++
++int fpu_emulator_save_context32(struct sigcontext32 __user *sc)
++{
++ return 0;
++}
++
++int fpu_emulator_restore_context32(struct sigcontext32 __user *sc)
++{
++ return 0;
++}
++
++#ifdef CONFIG_64BIT
++#endif /* CONFIG_64BIT */
++#endif /* CONFIG_MIPS_FPU_EMU */
+module_exit(fini);
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
-@@ -825,5 +825,22 @@ config IP_NF_TARGET_SET
- To compile it as a module, choose M here. If unsure, say N.
-
+@@ -684,5 +684,22 @@ config IP_NF_ARP_MANGLE
+ Allows altering the ARP packet payload: source and destination
+ hardware and network addresses.
+config IP_NF_TARGET_ROUTE
+ tristate 'ROUTE target support'
--- a/net/ipv4/netfilter/Makefile
+++ b/net/ipv4/netfilter/Makefile
-@@ -101,6 +101,7 @@ obj-$(CONFIG_IP_NF_TARGET_ECN) += ipt_EC
+@@ -100,6 +100,7 @@ obj-$(CONFIG_IP_NF_TARGET_ECN) += ipt_EC
obj-$(CONFIG_IP_NF_TARGET_IMQ) += ipt_IMQ.o
obj-$(CONFIG_IP_NF_TARGET_MASQUERADE) += ipt_MASQUERADE.o
obj-$(CONFIG_IP_NF_TARGET_REDIRECT) += ipt_REDIRECT.o
--- /dev/null
+--- a/scripts/unifdef.c
++++ b/scripts/unifdef.c
+@@ -206,7 +206,7 @@ static void done(void);
+ static void error(const char *);
+ static int findsym(const char *);
+ static void flushline(bool);
+-static Linetype getline(void);
++static Linetype get_line(void);
+ static Linetype ifeval(const char **);
+ static void ignoreoff(void);
+ static void ignoreon(void);
+@@ -512,7 +512,7 @@ process(void)
+
+ for (;;) {
+ linenum++;
+- lineval = getline();
++ lineval = get_line();
+ trans_table[ifstate[depth]][lineval]();
+ debug("process %s -> %s depth %d",
+ linetype_name[lineval],
+@@ -526,7 +526,7 @@ process(void)
+ * help from skipcomment().
+ */
+ static Linetype
+-getline(void)
++get_line(void)
+ {
+ const char *cp;
+ int cursym;
--- /dev/null
+[MIPS] Fix computation of {PGD,PMD,PTE}_T_LOG2.
+
+For the generation of asm-offset.h to work these need to be evaulatable
+by gcc as a constant expression. This issue did exist for a while but
+didn't bite because they're only in asm-offset.h for debugging purposes.
+
+--- a/include/asm-mips/pgtable.h
++++ b/include/asm-mips/pgtable.h
+@@ -168,9 +168,9 @@ static inline void pte_clear(struct mm_s
+ #define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0)
+ #endif
+
+-#define PGD_T_LOG2 ffz(~sizeof(pgd_t))
+-#define PMD_T_LOG2 ffz(~sizeof(pmd_t))
+-#define PTE_T_LOG2 ffz(~sizeof(pte_t))
++#define PGD_T_LOG2 (__builtin_ffs(sizeof(pgd_t)) - 1)
++#define PMD_T_LOG2 (__builtin_ffs(sizeof(pmd_t)) - 1)
++#define PTE_T_LOG2 (__builtin_ffs(sizeof(pte_t)) - 1)
+
+ extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
+
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