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authorMaciej W. Rozycki <macro@linux-mips.org>2015-04-03 23:26:04 +0100
committerRalf Baechle <ralf@linux-mips.org>2015-04-08 01:09:49 +0200
commit18a2c2c6b9319503eeac8a38b62fc82c9ff81b0d (patch)
tree42c8af04bc532a7b77b07fea94a3ce647346a067 /arch/mips/include
parente06b530b92364b2d6ce2981f2c775d2e79dc8f21 (diff)
downloadlinux-18a2c2c6b9319503eeac8a38b62fc82c9ff81b0d.tar.bz2
MIPS: Correct `nofpu' non-functionality
The `cpu_has_fpu' feature flag must not be hardcoded to 1 or the `nofpu' kernel option will be ignored. Remove any such overrides and add a cautionary note. Hardcoding to 0 is fine for FPU-less platforms. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9694/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include')
-rw-r--r--arch/mips/include/asm/cpu-features.h1
-rw-r--r--arch/mips/include/asm/mach-cobalt/cpu-feature-overrides.h1
-rw-r--r--arch/mips/include/asm/mach-dec/cpu-feature-overrides.h1
-rw-r--r--arch/mips/include/asm/mach-ip22/cpu-feature-overrides.h1
-rw-r--r--arch/mips/include/asm/mach-ip32/cpu-feature-overrides.h1
-rw-r--r--arch/mips/include/asm/mach-loongson/cpu-feature-overrides.h1
-rw-r--r--arch/mips/include/asm/mach-rm/cpu-feature-overrides.h1
7 files changed, 1 insertions, 6 deletions
diff --git a/arch/mips/include/asm/cpu-features.h b/arch/mips/include/asm/cpu-features.h
index ea68a38bb61d..62a4730de86a 100644
--- a/arch/mips/include/asm/cpu-features.h
+++ b/arch/mips/include/asm/cpu-features.h
@@ -68,6 +68,7 @@
#ifndef cpu_has_octeon_cache
#define cpu_has_octeon_cache 0
#endif
+/* Don't override `cpu_has_fpu' to 1 or the "nofpu" option won't work. */
#ifndef cpu_has_fpu
#define cpu_has_fpu (current_cpu_data.options & MIPS_CPU_FPU)
#define raw_cpu_has_fpu (raw_current_cpu_data.options & MIPS_CPU_FPU)
diff --git a/arch/mips/include/asm/mach-cobalt/cpu-feature-overrides.h b/arch/mips/include/asm/mach-cobalt/cpu-feature-overrides.h
index 71d4bface1dc..30c5cd9fd973 100644
--- a/arch/mips/include/asm/mach-cobalt/cpu-feature-overrides.h
+++ b/arch/mips/include/asm/mach-cobalt/cpu-feature-overrides.h
@@ -14,7 +14,6 @@
#define cpu_has_3k_cache 0
#define cpu_has_4k_cache 1
#define cpu_has_tx39_cache 0
-#define cpu_has_fpu 1
#define cpu_has_32fpr 1
#define cpu_has_counter 1
#define cpu_has_watch 0
diff --git a/arch/mips/include/asm/mach-dec/cpu-feature-overrides.h b/arch/mips/include/asm/mach-dec/cpu-feature-overrides.h
index acce27fd2bb8..bdf045fb00c8 100644
--- a/arch/mips/include/asm/mach-dec/cpu-feature-overrides.h
+++ b/arch/mips/include/asm/mach-dec/cpu-feature-overrides.h
@@ -15,7 +15,6 @@
/* Generic ones first. */
#define cpu_has_tlb 1
#define cpu_has_tx39_cache 0
-#define cpu_has_fpu 1
#define cpu_has_divec 0
#define cpu_has_prefetch 0
#define cpu_has_mcheck 0
diff --git a/arch/mips/include/asm/mach-ip22/cpu-feature-overrides.h b/arch/mips/include/asm/mach-ip22/cpu-feature-overrides.h
index 1dfe47453ea4..9b19b72dba56 100644
--- a/arch/mips/include/asm/mach-ip22/cpu-feature-overrides.h
+++ b/arch/mips/include/asm/mach-ip22/cpu-feature-overrides.h
@@ -16,7 +16,6 @@
#define cpu_has_tlb 1
#define cpu_has_4kex 1
#define cpu_has_4k_cache 1
-#define cpu_has_fpu 1
#define cpu_has_32fpr 1
#define cpu_has_counter 1
#define cpu_has_mips16 0
diff --git a/arch/mips/include/asm/mach-ip32/cpu-feature-overrides.h b/arch/mips/include/asm/mach-ip32/cpu-feature-overrides.h
index 2e1ec6cfedd5..241409b78ff1 100644
--- a/arch/mips/include/asm/mach-ip32/cpu-feature-overrides.h
+++ b/arch/mips/include/asm/mach-ip32/cpu-feature-overrides.h
@@ -26,7 +26,6 @@
/* Settings which are common for all ip32 CPUs */
#define cpu_has_tlb 1
#define cpu_has_4kex 1
-#define cpu_has_fpu 1
#define cpu_has_32fpr 1
#define cpu_has_counter 1
#define cpu_has_mips16 0
diff --git a/arch/mips/include/asm/mach-loongson/cpu-feature-overrides.h b/arch/mips/include/asm/mach-loongson/cpu-feature-overrides.h
index 6d69332f21ec..acc376897e46 100644
--- a/arch/mips/include/asm/mach-loongson/cpu-feature-overrides.h
+++ b/arch/mips/include/asm/mach-loongson/cpu-feature-overrides.h
@@ -34,7 +34,6 @@
#define cpu_has_dsp 0
#define cpu_has_dsp2 0
#define cpu_has_ejtag 0
-#define cpu_has_fpu 1
#define cpu_has_ic_fills_f_dc 0
#define cpu_has_inclusive_pcaches 1
#define cpu_has_llsc 1
diff --git a/arch/mips/include/asm/mach-rm/cpu-feature-overrides.h b/arch/mips/include/asm/mach-rm/cpu-feature-overrides.h
index f095c529c48c..98cf40417c5d 100644
--- a/arch/mips/include/asm/mach-rm/cpu-feature-overrides.h
+++ b/arch/mips/include/asm/mach-rm/cpu-feature-overrides.h
@@ -15,7 +15,6 @@
#define cpu_has_tlb 1
#define cpu_has_4kex 1
#define cpu_has_4k_cache 1
-#define cpu_has_fpu 1
#define cpu_has_32fpr 1
#define cpu_has_counter 1
#define cpu_has_watch 0