um: Replace to_phys() and to_virt() with less generic function names

The UML function names to_virt() and to_phys() are exposed by UML
headers, and are very generic and may be defined by drivers.  As it
turns out, commit 52dffcc0903f ("pmem: refactor pmem_clear_poison()")
did exactly that.

This results in build errors such as the following when trying to build
um:allmodconfig:

  drivers/nvdimm/pmem.c: In function ‘pmem_dax_zero_page_range’:
  ./arch/um/include/asm/page.h:105:20: error: too few arguments to function ‘to_phys’
    105 | #define __pa(virt) to_phys((void *) (unsigned long) (virt))
        |                    ^~~~~~~

Use less generic function names for the um specific to_phys() and
to_virt() functions to fix the problem and to avoid similar problems in
the future.

Fixes: 52dffcc0903f ("pmem: refactor pmem_clear_poison()")
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/um/include/asm/page.h b/arch/um/include/asm/page.h
index 95af12e82a328448ce122a4eb81996d26bd1cb02..cdbd9653aa14e5b29ffba30d98a2741de6bc31aa 100644 (file)
--- a/arch/um/include/asm/page.h
+++ b/arch/um/include/asm/page.h
@@ -102,8 +102,8 @@ extern unsigned long uml_physmem;
  * casting is the right thing, but 32-bit UML can't have 64-bit virtual
  * addresses
  */
-#define __pa(virt) to_phys((void *) (unsigned long) (virt))
-#define __va(phys) to_virt((unsigned long) (phys))
+#define __pa(virt) uml_to_phys((void *) (unsigned long) (virt))
+#define __va(phys) uml_to_virt((unsigned long) (phys))
 
 #define phys_to_pfn(p) ((p) >> PAGE_SHIFT)
 #define pfn_to_phys(pfn) PFN_PHYS(pfn)

diff --git a/arch/um/include/shared/mem.h b/arch/um/include/shared/mem.h
index 4862c91d4213c4f6d1c1e9430ca902e080aae0a2..98aacd54410801551d3b887e1181a9e7b0f7429f 100644 (file)
--- a/arch/um/include/shared/mem.h
+++ b/arch/um/include/shared/mem.h
@@ -9,12 +9,12 @@
 extern int phys_mapping(unsigned long phys, unsigned long long *offset_out);
 
 extern unsigned long uml_physmem;
-static inline unsigned long to_phys(void *virt)
+static inline unsigned long uml_to_phys(void *virt)
 {
        return(((unsigned long) virt) - uml_physmem);
 }
 
-static inline void *to_virt(unsigned long phys)
+static inline void *uml_to_virt(unsigned long phys)
 {
        return((void *) uml_physmem + phys);
 }

diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index 87d3129e7362ef25659c3a3245dfcbc8e998fc85..c316c993a94918d1b5d2b73a49be2501cc8a609f 100644 (file)
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -251,7 +251,7 @@ static int userspace_tramp(void *stack)
        signal(SIGTERM, SIG_DFL);
        signal(SIGWINCH, SIG_IGN);
 
-       fd = phys_mapping(to_phys(__syscall_stub_start), &offset);
+       fd = phys_mapping(uml_to_phys(__syscall_stub_start), &offset);
        addr = mmap64((void *) STUB_CODE, UM_KERN_PAGE_SIZE,
                      PROT_EXEC, MAP_FIXED | MAP_PRIVATE, fd, offset);
        if (addr == MAP_FAILED) {
@@ -261,7 +261,7 @@ static int userspace_tramp(void *stack)
        }
 
        if (stack != NULL) {
-               fd = phys_mapping(to_phys(stack), &offset);
+               fd = phys_mapping(uml_to_phys(stack), &offset);
                addr = mmap((void *) STUB_DATA,
                            UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE,
                            MAP_FIXED | MAP_SHARED, fd, offset);
@@ -534,7 +534,7 @@ int copy_context_skas0(unsigned long new_stack, int pid)
        struct stub_data *data = (struct stub_data *) current_stack;
        struct stub_data *child_data = (struct stub_data *) new_stack;
        unsigned long long new_offset;
-       int new_fd = phys_mapping(to_phys((void *)new_stack), &new_offset);
+       int new_fd = phys_mapping(uml_to_phys((void *)new_stack), &new_offset);
 
        /*
         * prepare offset and fd of child's stack as argument for parent's