Merge branch 'parisc-3.14' of git://git.kernel.org/pub/scm/linux/kern…

…el/git/deller/parisc-linux Pull parisc updates from Helge Deller: "The three major changes in this patchset is a implementation for flexible userspace memory maps, cache-flushing fixes (again), and a long-discussed ABI change to make EWOULDBLOCK the same value as EAGAIN. parisc has been the only platform where we had EWOULDBLOCK != EAGAIN to keep HP-UX compatibility. Since we will probably never implement full HP-UX support, we prefer to drop this compatibility to make it easier for us with Linux userspace programs which mostly never checked for both values. We don't expect major fall-outs because of this change, and if we face some, we will simply rebuild the necessary applications in the debian archives" * 'parisc-3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: add flexible mmap memory layout support parisc: Make EWOULDBLOCK be equal to EAGAIN on parisc parisc: convert uapi/asm/stat.h to use native types only parisc: wire up sched_setattr and sched_getattr parisc: fix cache-flushing parisc/sti_console: prefer Linux fonts over built-in ROM fonts
rtvt123 · Feb 3, 2014 · 69048e0 · 69048e0
2 parents 1c0b8a7 + 9dabf60
commit 69048e0
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Showing 15 changed files with 278 additions and 73 deletions.
diff --git a/arch/parisc/include/asm/cacheflush.h b/arch/parisc/include/asm/cacheflush.h
@@ -132,7 +132,6 @@ void mark_rodata_ro(void);
 static inline void *kmap(struct page *page)
 {
 	might_sleep();
-	flush_dcache_page(page);
 	return page_address(page);
 }
 
@@ -144,7 +143,6 @@ static inline void kunmap(struct page *page)
 static inline void *kmap_atomic(struct page *page)
 {
 	pagefault_disable();
-	flush_dcache_page(page);
 	return page_address(page);
 }
 

diff --git a/arch/parisc/include/asm/elf.h b/arch/parisc/include/asm/elf.h
@@ -348,4 +348,8 @@ struct pt_regs;	/* forward declaration... */
 
 #define ELF_HWCAP	0
 
+struct mm_struct;
+extern unsigned long arch_randomize_brk(struct mm_struct *);
+#define arch_randomize_brk arch_randomize_brk
+
 #endif
diff --git a/arch/parisc/include/asm/page.h b/arch/parisc/include/asm/page.h
@@ -29,7 +29,8 @@ struct page;
 void clear_page_asm(void *page);
 void copy_page_asm(void *to, void *from);
 #define clear_user_page(vto, vaddr, page) clear_page_asm(vto)
-#define copy_user_page(vto, vfrom, vaddr, page) copy_page_asm(vto, vfrom)
+void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
+			struct page *pg);
 
 /* #define CONFIG_PARISC_TMPALIAS */
 

diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h
@@ -511,6 +511,7 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
 /* We provide our own get_unmapped_area to provide cache coherency */
 
 #define HAVE_ARCH_UNMAPPED_AREA
+#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
 
 #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
 #define __HAVE_ARCH_PTEP_GET_AND_CLEAR

diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h
@@ -30,6 +30,8 @@
 #endif
 #define current_text_addr() ({ void *pc; current_ia(pc); pc; })
 
+#define HAVE_ARCH_PICK_MMAP_LAYOUT
+
 #define TASK_SIZE_OF(tsk)       ((tsk)->thread.task_size)
 #define TASK_SIZE	        TASK_SIZE_OF(current)
 #define TASK_UNMAPPED_BASE      (current->thread.map_base)

diff --git a/arch/parisc/include/asm/thread_info.h b/arch/parisc/include/asm/thread_info.h
@@ -76,6 +76,16 @@ struct thread_info {
 #define _TIF_SYSCALL_TRACE_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP |	\
 				 _TIF_BLOCKSTEP | _TIF_SYSCALL_AUDIT)
 
+#ifdef CONFIG_64BIT
+# ifdef CONFIG_COMPAT
+#  define is_32bit_task()	(test_thread_flag(TIF_32BIT))
+# else
+#  define is_32bit_task()	(0)
+# endif
+#else
+# define is_32bit_task()	(1)
+#endif
+
 #endif /* __KERNEL__ */
 
 #endif /* _ASM_PARISC_THREAD_INFO_H */
diff --git a/arch/parisc/include/uapi/asm/errno.h b/arch/parisc/include/uapi/asm/errno.h
@@ -106,7 +106,7 @@
 
 #define	EALREADY	244	/* Operation already in progress */
 #define	EINPROGRESS	245	/* Operation now in progress */
-#define	EWOULDBLOCK	246	/* Operation would block (Linux returns EAGAIN) */
+#define	EWOULDBLOCK	EAGAIN	/* Operation would block (Not HPUX compliant) */
 #define	ENOTEMPTY	247	/* Directory not empty */
 #define	ENAMETOOLONG	248	/* File name too long */
 #define	ELOOP		249	/* Too many symbolic links encountered */

diff --git a/arch/parisc/include/uapi/asm/stat.h b/arch/parisc/include/uapi/asm/stat.h
@@ -5,67 +5,65 @@
 
 struct stat {
 	unsigned int	st_dev;		/* dev_t is 32 bits on parisc */
-	ino_t		st_ino;		/* 32 bits */
-	mode_t		st_mode;	/* 16 bits */
+	unsigned int	st_ino;		/* 32 bits */
+	unsigned short	st_mode;	/* 16 bits */
 	unsigned short	st_nlink;	/* 16 bits */
 	unsigned short	st_reserved1;	/* old st_uid */
 	unsigned short	st_reserved2;	/* old st_gid */
 	unsigned int	st_rdev;
-	off_t		st_size;
-	time_t		st_atime;
+	signed int	st_size;
+	signed int	st_atime;
 	unsigned int	st_atime_nsec;
-	time_t		st_mtime;
+	signed int	st_mtime;
 	unsigned int	st_mtime_nsec;
-	time_t		st_ctime;
+	signed int	st_ctime;
 	unsigned int	st_ctime_nsec;
 	int		st_blksize;
 	int		st_blocks;
 	unsigned int	__unused1;	/* ACL stuff */
 	unsigned int	__unused2;	/* network */
-	ino_t		__unused3;	/* network */
+	unsigned int	__unused3;	/* network */
 	unsigned int	__unused4;	/* cnodes */
 	unsigned short	__unused5;	/* netsite */
 	short		st_fstype;
 	unsigned int	st_realdev;
 	unsigned short	st_basemode;
 	unsigned short	st_spareshort;
-	uid_t		st_uid;
-	gid_t		st_gid;
+	unsigned int	st_uid;
+	unsigned int	st_gid;
 	unsigned int	st_spare4[3];
 };
 
 #define STAT_HAVE_NSEC
 
-typedef __kernel_off64_t	off64_t;
-
 struct hpux_stat64 {
 	unsigned int	st_dev;		/* dev_t is 32 bits on parisc */
-	ino_t           st_ino;         /* 32 bits */
-	mode_t		st_mode;	/* 16 bits */
+	unsigned int	st_ino;         /* 32 bits */
+	unsigned short	st_mode;	/* 16 bits */
 	unsigned short	st_nlink;	/* 16 bits */
 	unsigned short	st_reserved1;	/* old st_uid */
 	unsigned short	st_reserved2;	/* old st_gid */
 	unsigned int	st_rdev;
-	off64_t		st_size;
-	time_t		st_atime;
+	signed long long st_size;
+	signed int	st_atime;
 	unsigned int	st_spare1;
-	time_t		st_mtime;
+	signed int	st_mtime;
 	unsigned int	st_spare2;
-	time_t		st_ctime;
+	signed int	st_ctime;
 	unsigned int	st_spare3;
 	int		st_blksize;
-	__u64		st_blocks;
+	unsigned long long st_blocks;
 	unsigned int	__unused1;	/* ACL stuff */
 	unsigned int	__unused2;	/* network */
-	ino_t           __unused3;      /* network */
+	unsigned int	__unused3;      /* network */
 	unsigned int	__unused4;	/* cnodes */
 	unsigned short	__unused5;	/* netsite */
 	short		st_fstype;
 	unsigned int	st_realdev;
 	unsigned short	st_basemode;
 	unsigned short	st_spareshort;
-	uid_t		st_uid;
-	gid_t		st_gid;
+	unsigned int	st_uid;
+	unsigned int	st_gid;
 	unsigned int	st_spare4[3];
 };
 

diff --git a/arch/parisc/include/uapi/asm/unistd.h b/arch/parisc/include/uapi/asm/unistd.h
@@ -826,8 +826,10 @@
 #define __NR_process_vm_writev	(__NR_Linux + 331)
 #define __NR_kcmp		(__NR_Linux + 332)
 #define __NR_finit_module	(__NR_Linux + 333)
+#define __NR_sched_setattr	(__NR_Linux + 334)
+#define __NR_sched_getattr	(__NR_Linux + 335)
 
-#define __NR_Linux_syscalls	(__NR_finit_module + 1)
+#define __NR_Linux_syscalls	(__NR_sched_getattr + 1)
 
 
 #define __IGNORE_select		/* newselect */

diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
@@ -388,6 +388,20 @@ void flush_kernel_dcache_page_addr(void *addr)
 }
 EXPORT_SYMBOL(flush_kernel_dcache_page_addr);
 
+void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
+	struct page *pg)
+{
+       /* Copy using kernel mapping.  No coherency is needed (all in
+	  kunmap) for the `to' page.  However, the `from' page needs to
+	  be flushed through a mapping equivalent to the user mapping
+	  before it can be accessed through the kernel mapping. */
+	preempt_disable();
+	flush_dcache_page_asm(__pa(vfrom), vaddr);
+	preempt_enable();
+	copy_page_asm(vto, vfrom);
+}
+EXPORT_SYMBOL(copy_user_page);
+
 void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
 {
 	unsigned long flags;

diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
@@ -13,7 +13,7 @@
  *    Copyright (C) 2000 Grant Grundler <grundler with parisc-linux.org>
  *    Copyright (C) 2001 Alan Modra <amodra at parisc-linux.org>
  *    Copyright (C) 2001-2002 Ryan Bradetich <rbrad at parisc-linux.org>
- *    Copyright (C) 2001-2007 Helge Deller <deller at parisc-linux.org>
+ *    Copyright (C) 2001-2014 Helge Deller <deller@gmx.de>
  *    Copyright (C) 2002 Randolph Chung <tausq with parisc-linux.org>
  *
  *
@@ -49,6 +49,7 @@
 #include <linux/kallsyms.h>
 #include <linux/uaccess.h>
 #include <linux/rcupdate.h>
+#include <linux/random.h>
 
 #include <asm/io.h>
 #include <asm/asm-offsets.h>
@@ -286,3 +287,21 @@ void *dereference_function_descriptor(void *ptr)
 	return ptr;
 }
 #endif
+
+static inline unsigned long brk_rnd(void)
+{
+	/* 8MB for 32bit, 1GB for 64bit */
+	if (is_32bit_task())
+		return (get_random_int() & 0x7ffUL) << PAGE_SHIFT;
+	else
+		return (get_random_int() & 0x3ffffUL) << PAGE_SHIFT;
+}
+
+unsigned long arch_randomize_brk(struct mm_struct *mm)
+{
+	unsigned long ret = PAGE_ALIGN(mm->brk + brk_rnd());
+
+	if (ret < mm->brk)
+		return mm->brk;
+	return ret;
+}