diff options
Diffstat (limited to 'target/linux/generic/patches-3.19/304-mips_disable_fpu.patch')
| -rw-r--r-- | target/linux/generic/patches-3.19/304-mips_disable_fpu.patch | 36 |
1 files changed, 5 insertions, 31 deletions
diff --git a/target/linux/generic/patches-3.19/304-mips_disable_fpu.patch b/target/linux/generic/patches-3.19/304-mips_disable_fpu.patch index 9cb4f6afa6..8413dba7c2 100644 --- a/target/linux/generic/patches-3.19/304-mips_disable_fpu.patch +++ b/target/linux/generic/patches-3.19/304-mips_disable_fpu.patch @@ -1,29 +1,3 @@ -From: Manuel Lauss <manuel.lauss@gmail.com> -Subject: [RFC PATCH v4 2/2] MIPS: make FPU emulator optional -Date: Mon, 7 Apr 2014 12:57:04 +0200 -Message-Id: <1396868224-252888-2-git-send-email-manuel.lauss@gmail.com> - -This small patch makes the MIPS FPU emulator optional. The kernel -kills float-users on systems without a hardware FPU by sending a SIGILL. - -Disabling the emulator shrinks vmlinux by about 54kBytes (32bit, -optimizing for size). - -Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> ---- -v4: rediffed because of patch 1/2, should now work with micromips as well -v3: updated patch description with size savings. -v2: incorporated changes suggested by Jonas Gorski - force the fpu emulator on for micromips: relocating the parts - of the mmips code in the emulator to other areas would be a - much larger change; I went the cheap route instead with this. - - arch/mips/Kbuild | 2 +- - arch/mips/Kconfig | 14 ++++++++++++++ - arch/mips/include/asm/fpu.h | 5 +++-- - arch/mips/include/asm/fpu_emulator.h | 15 +++++++++++++++ - 4 files changed, 33 insertions(+), 3 deletions(-) - --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2521,6 +2521,20 @@ config MIPS_O32_FP64_SUPPORT @@ -60,12 +34,12 @@ v2: incorporated changes suggested by Jonas Gorski core-y += arch/mips/ --- a/arch/mips/include/asm/fpu.h +++ b/arch/mips/include/asm/fpu.h -@@ -201,8 +201,10 @@ static inline int init_fpu(void) - write_c0_config5(config5); - enable_fpu_hazard(); - } +@@ -210,8 +210,10 @@ static inline int init_fpu(void) + /* Restore FRE */ + write_c0_config5(config5); + enable_fpu_hazard(); - } else -+ } else if (IS_ENABLED(CONFIG_MIPS_FPU_EMULATOR)) ++ } else (IS_ENABLED(CONFIG_MIPS_FPU_EMULATOR)) fpu_emulator_init_fpu(); + else + ret = SIGILL; |