From: Mateusz Majewski <m.majewski2@samsung.com>
Date: Mon, 28 Aug 2023 06:39:42 +0000 (+0200)
Subject: zlogger: drop old kernel support
X-Git-Tag: accepted/tizen/unified/20230919.091736~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9f0e1e47f5a0bb961d1c7c451b59c7103e662510;p=platform%2Fkernel%2Flinux-tizen-modules-source.git

zlogger: drop old kernel support

The oldest kernel this is currently built against is 5.15.

Change-Id: I4b02abcd5785fe75c79eb05f30aa68ce1d555b71
Signed-off-by: Mateusz Majewski <m.majewski2@samsung.com>
---

diff --git a/kernel/zlogger/zlogger.c b/kernel/zlogger/zlogger.c
index 1c047a9..c99630a 100644
--- a/kernel/zlogger/zlogger.c
+++ b/kernel/zlogger/zlogger.c
@@ -130,13 +130,6 @@ module_param_named(zlog_enable, g_zlog_enable, int, 0644);
 
 static int zlogger_unmap(struct thread_table_field *ptr);
 
-#if (KERNEL_VERSION(3, 17, 0) > LINUX_VERSION_CODE)
-static inline u64 ktime_get_ns(void)
-{
-	return ktime_to_ns(ktime_get());
-}
-#endif
-
 static struct thread_table_field *get_thread_table(pid_t tid, bool is_stdout)
 {
 	struct thread_table_field *ptr = NULL;
@@ -406,14 +399,9 @@ static void zlogger_vm_close(struct vm_area_struct *vma)
 }
 
 /* called under mmap semaphore */
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
 static vm_fault_t zlogger_fault(struct vm_fault *vmf)
 {
 	struct vm_area_struct *vma = vmf->vma;
-#else
-static int zlogger_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
-{
-#endif
 	struct thread_table_field *ptr;
 	void *p = NULL;
 	struct page *page;
@@ -431,11 +419,7 @@ static int zlogger_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 
 	page = virt_to_page((unsigned long)p);
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
 	return vmf_insert_pfn(vma, vma->vm_start, page_to_pfn(page));
-#else
-	return vm_insert_pfn(vma, vma->vm_start, page_to_pfn(page));
-#endif
 }
 
 static const struct vm_operations_struct zlogger_vm_ops = {
@@ -485,24 +469,13 @@ static int zlogger_unmap(struct thread_table_field *ptr)
 	if (!ptr->vma)
 		return 0;
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 8, 0)
 	if (mmap_write_lock_killable(vma->vm_mm))
 		return -EINTR;
-#elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0)
-	if (down_write_killable(&vma->vm_mm->mmap_sem))
-		return -EINTR;
-#else
-	down_write(&vma->vm_mm->mmap_sem);
-#endif
 
 	zap_vma_ptes(vma, vma->vm_start, vma->vm_end - vma->vm_start);
 	vma->vm_private_data = NULL;
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 8, 0)
 	mmap_write_unlock(vma->vm_mm);
-#else
-	up_write(&vma->vm_mm->mmap_sem);
-#endif
 	return 0;
 }
 
@@ -535,24 +508,13 @@ static int zlogger_realloc_mmap(struct file *filp)
 
 	page = virt_to_page((unsigned long)p);
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 8, 0)
 	if (mmap_write_lock_killable(current->mm))
 		return -EINTR;
-#elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0)
-	if (down_write_killable(&current->mm->mmap_sem))
-		return -EINTR;
-#else
-	down_write(&current->mm->mmap_sem);
-#endif
 
 	zap_vma_ptes(vma, vma->vm_start, vma->vm_end - vma->vm_start);
 	ret = remap_pfn_range(vma, vma->vm_start, page_to_pfn(page), ZLOGGER_BLOCK_SIZE, vma->vm_page_prot);
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 8, 0)
 	mmap_write_unlock(current->mm);
-#else
-	up_write(&current->mm->mmap_sem);
-#endif
 
 	return ret;
 }