Merge tag 'samsung-mach-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/soc

Samsung updates for v4.2

- add failure(exception) handling
  : of_iomap(), of_find_device_by_node() and kstrdup()

- add common poweroff to use PS_HOLD based for all of exynos SoCs
- add exnos_get/set_boot_addr() helper
- constify platform_device_id and irq_domain_ops
- get current parent clock for power domain on/off
- use core_initcall to register power domain driver
- make exynos_core_restart() less verbose

- add support coupled CPUidle for exynos3250

- fix exynos_boot_secondary() return value on timeout
- fix clk_enable() in s3c24xx adc
- fix missing of_node_put() for power domains

* tag 'samsung-mach-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: (301 commits)
  ARM: EXYNOS: register power domain driver from core_initcall
  ARM: EXYNOS: use PS_HOLD based poweroff for all supported SoCs
  ARM: SAMSUNG: Constify platform_device_id
  ARM: EXYNOS: Constify irq_domain_ops
  ARM: EXYNOS: add coupled cpuidle support for Exynos3250
  ARM: EXYNOS: add exynos_get_boot_addr() helper
  ARM: EXYNOS: add exynos_set_boot_addr() helper
  ARM: EXYNOS: make exynos_core_restart() less verbose
  ARM: EXYNOS: fix exynos_boot_secondary() return value on timeout
  ARM: EXYNOS: Get current parent clock for power domain on/off
  ARM: SAMSUNG: fix clk_enable() WARNing in S3C24XX ADC
  ARM: EXYNOS: Add missing of_node_put() when parsing power domains
  ARM: EXYNOS: Handle of_find_device_by_node() and kstrdup() failures
  ARM: EXYNOS: Handle of of_iomap() failure
  Linux 4.1-rc4
  ....

1 files changed, 17 insertions, 15 deletions

diff --git a/arch/mips/kernel/elf.c b/arch/mips/kernel/elf.c
index be4899f3c393..4a4d9e067c89 100644
--- a/arch/mips/kernel/elf.c
+++ b/arch/mips/kernel/elf.c
@@ -76,14 +76,6 @@ int arch_elf_pt_proc(void *_ehdr, void *_phdr, struct file *elf,
 
 	/* Lets see if this is an O32 ELF */
 	if (ehdr32->e_ident[EI_CLASS] == ELFCLASS32) {
-		/* FR = 1 for N32 */
-		if (ehdr32->e_flags & EF_MIPS_ABI2)
-			state->overall_fp_mode = FP_FR1;
-		else
-			/* Set a good default FPU mode for O32 */
-			state->overall_fp_mode = cpu_has_mips_r6 ?
-				FP_FRE : FP_FR0;
-
 		if (ehdr32->e_flags & EF_MIPS_FP64) {
 			/*
 			 * Set MIPS_ABI_FP_OLD_64 for EF_MIPS_FP64. We will override it
@@ -104,9 +96,6 @@ int arch_elf_pt_proc(void *_ehdr, void *_phdr, struct file *elf,
 				  (char *)&abiflags,
 				  sizeof(abiflags));
 	} else {
-		/* FR=1 is really the only option for 64-bit */
-		state->overall_fp_mode = FP_FR1;
-
 		if (phdr64->p_type != PT_MIPS_ABIFLAGS)
 			return 0;
 		if (phdr64->p_filesz < sizeof(abiflags))
@@ -137,6 +126,7 @@ int arch_check_elf(void *_ehdr, bool has_interpreter,
 	struct elf32_hdr *ehdr = _ehdr;
 	struct mode_req prog_req, interp_req;
 	int fp_abi, interp_fp_abi, abi0, abi1, max_abi;
+	bool is_mips64;
 
 	if (!config_enabled(CONFIG_MIPS_O32_FP64_SUPPORT))
 		return 0;
@@ -152,10 +142,22 @@ int arch_check_elf(void *_ehdr, bool has_interpreter,
 		abi0 = abi1 = fp_abi;
 	}
 
-	/* ABI limits. O32 = FP_64A, N32/N64 = FP_SOFT */
-	max_abi = ((ehdr->e_ident[EI_CLASS] == ELFCLASS32) &&
-		   (!(ehdr->e_flags & EF_MIPS_ABI2))) ?
-		MIPS_ABI_FP_64A : MIPS_ABI_FP_SOFT;
+	is_mips64 = (ehdr->e_ident[EI_CLASS] == ELFCLASS64) ||
+		    (ehdr->e_flags & EF_MIPS_ABI2);
+
+	if (is_mips64) {
+		/* MIPS64 code always uses FR=1, thus the default is easy */
+		state->overall_fp_mode = FP_FR1;
+
+		/* Disallow access to the various FPXX & FP64 ABIs */
+		max_abi = MIPS_ABI_FP_SOFT;
+	} else {
+		/* Default to a mode capable of running code expecting FR=0 */
+		state->overall_fp_mode = cpu_has_mips_r6 ? FP_FRE : FP_FR0;
+
+		/* Allow all ABIs we know about */
+		max_abi = MIPS_ABI_FP_64A;
+	}
 
 	if ((abi0 > max_abi && abi0 != MIPS_ABI_FP_UNKNOWN) ||
 	    (abi1 > max_abi && abi1 != MIPS_ABI_FP_UNKNOWN))