[patch 019/108] fs/file.c: replace alloc_fdmem() with kvmalloc() alternative

[patch 019/108] fs/file.c: replace alloc_fdmem() with kvmalloc() alternative

[akpm]

From: Michal Hocko <mhocko@suse.com>
Subject: fs/file.c: replace alloc_fdmem() with kvmalloc() alternative

There is no real reason to duplicate kvmalloc* helpers so drop alloc_fdmem
and replace it with the appropriate library function.

Link: http://lkml.kernel.org/r/20170531155145.17111-2-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/file.c |   22 ++++------------------
 1 file changed, 4 insertions(+), 18 deletions(-)

diff -puN fs/file.c~fs-file-replace-alloc_fdmem-with-kvmalloc-alternative fs/file.c
--- a/fs/file.c~fs-file-replace-alloc_fdmem-with-kvmalloc-alternative
+++ a/fs/file.c
@@ -30,21 +30,6 @@ unsigned int sysctl_nr_open_min = BITS_P
 unsigned int sysctl_nr_open_max =
 	__const_min(INT_MAX, ~(size_t)0/sizeof(void *)) & -BITS_PER_LONG;
 
-static void *alloc_fdmem(size_t size)
-{
-	/*
-	 * Very large allocations can stress page reclaim, so fall back to
-	 * vmalloc() if the allocation size will be considered "large" by the VM.
-	 */
-	if (size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) {
-		void *data = kmalloc(size, GFP_KERNEL_ACCOUNT |
-				     __GFP_NOWARN | __GFP_NORETRY);
-		if (data != NULL)
-			return data;
-	}
-	return __vmalloc(size, GFP_KERNEL_ACCOUNT, PAGE_KERNEL);
-}