From: Rebecca Schultz Zavin <rebecca@android.com>
Date: Thu, 29 Apr 2010 20:36:55 +0000 (-0700)
Subject: net: ppp_deflate: Switch z_decomp_alloc to vmalloced decompress buffers
X-Git-Tag: firefly_0821_release~9834^2~509
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=bfea4fcd5b2ec1a135aa465b6c4ceb16c2c63d4e;p=firefly-linux-kernel-4.4.55.git

net: ppp_deflate: Switch z_decomp_alloc to vmalloced decompress buffers

On systems with high memory pressure, allocating an order 4 contiguous region
for decompression can fail at run time.  Instead use virtually contigous memory
allocated via vmalloc.

Change-Id: I7821882bd183a1de0d73ab2932f6e6978e4f0970
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
---

diff --git a/drivers/net/ppp_deflate.c b/drivers/net/ppp_deflate.c
index 695bc83e0cfd..bda70852c5ef 100644
--- a/drivers/net/ppp_deflate.c
+++ b/drivers/net/ppp_deflate.c
@@ -306,7 +306,7 @@ static void z_decomp_free(void *arg)
 
 	if (state) {
 		zlib_inflateEnd(&state->strm);
-		kfree(state->strm.workspace);
+		vfree(state->strm.workspace);
 		kfree(state);
 	}
 }
@@ -346,8 +346,7 @@ static void *z_decomp_alloc(unsigned char *options, int opt_len)
 
 	state->w_size         = w_size;
 	state->strm.next_out  = NULL;
-	state->strm.workspace = kmalloc(zlib_inflate_workspacesize(),
-					GFP_KERNEL|__GFP_REPEAT);
+	state->strm.workspace = vmalloc(zlib_inflate_workspacesize());
 	if (state->strm.workspace == NULL)
 		goto out_free;