[PATCH 1/3] um: Use PAGE_ALIGN() for address alignment

[Tiwei Bie <tiwei.bie@linux.dev>]

From: Tiwei Bie <tiwei.btw@antgroup.com>

Use PAGE_ALIGN() instead of open-coded calculations.

Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
---
 arch/um/kernel/um_arch.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index cfbbbf8500c3..4bba77a28454 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -298,10 +298,7 @@ static unsigned long __init get_top_address(char **envp)
 			top_addr = (unsigned long) envp[i];
 	}
 
-	top_addr &= ~(UM_KERN_PAGE_SIZE - 1);
-	top_addr += UM_KERN_PAGE_SIZE;
-
-	return top_addr;
+	return PAGE_ALIGN(top_addr + 1);
 }
 
 int __init linux_main(int argc, char **argv, char **envp)
@@ -369,8 +366,8 @@ int __init linux_main(int argc, char **argv, char **envp)
 
 	setup_machinename(init_utsname()->machine);
 
-	physmem_size = (physmem_size + PAGE_SIZE - 1) & PAGE_MASK;
-	iomem_size = (iomem_size + PAGE_SIZE - 1) & PAGE_MASK;
+	physmem_size = PAGE_ALIGN(physmem_size);
+	iomem_size = PAGE_ALIGN(iomem_size);
 
 	max_physmem = TASK_SIZE - uml_physmem - iomem_size - MIN_VMALLOC;
 	if (physmem_size > max_physmem) {
-- 
2.34.1